LET Reviewer - PHYSICAL SCIENCE (MECHANICS) Set 2

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for Physical Science" border="0" src="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" title="LET Reviewer for Physical Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Physical Science</td></tr> </tbody></table>  <b>PRACTICE TEST IN PHYSICAL SCIENCE (<i>MECHANICS</i>)</b><br /> <br /> 1. According to Newton’s second law of motion<br /> a. force on an object is equal to its acceleration divided by its mass<br /> b. force on an object is equal to the product of its mass and acceleration<br /> c. mass of an object is equal to the product of the force on it and its acceleration<br /> d. acceleration of an object is equal to the product of the force on its and its mass<br /> <br /> 2. The acceleration produced by a net force on an object is<br /> a. directly proportional to the mass<br /> b. inversely proportional to the net force<br /> c. in the same direction as the net force<br /> d. all of the above<br /> <br /> 3. The weight of an object of an object<br /> a. refers to its inertia<br /> b. is the quantity of matter it contains<br /> c. is the force with which it is attracted to the earth<br /> d. is basically the same quantity as its mass but expressed in different units<br /> <br /> 4. The force that accelerates a rocket into outer space is exerted on the rocket by the exhaust gases. Which Newton’s law of motion is illustrated in this situation?<br /> a. First law of motion<br /> b. Second law of motion<br /> c. Third law of motion<br /> d. cannot be determined<br /> <br /> 5. An object weighs 30 N on earth. A second object weighs 30 N on the moon. Which object has the greater mass?<br /> a. the one on earth<br /> b. the one on the moon<br /> c. they have the same mass<br /> <br /> 6. As an airplane climbs,<br /> a. its mass increases<br /> b. its mass decreases<br /> c. its weight increases<br /> d. its weight decrease<br /> <br /> 7. Suppose a cart is being moved by a force. If suddenly a load is dumped into the cart so that the cart’s mass doubles, what happens to the cart’s acceleration?<br /> a. it doubles<br /> b. it triples<br /> c. it halves<br /> d. it stays the same<br /> <br /> 8. A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force?<br /> a. the weight of the ball<br /> b. the air resistance on the ball<br /> c. the force of the ball against the bat<br /> d. the grip of the player’s hand against the bat<br /> <br /> 9. When a football is kicked, the action – and – reaction forces do not cancel each other because<br /> a. they are not truly equal and opposite<br /> b. they are not acting at the same time<br /> c. they are acting on two different bodies<br /> d. all of them<br /> <br /> 10. A car accelerates along a road. Viewed from outside the car, what is the force that accelerates it?<br /> a. the engines pulling it forward<br /> b. air rushing in behind the car as it moves<br /> c. the wheels pulling forward on the wheels<br /> d. the reaction force to the wheels pushing the road backward<br /> <br /> 11. A car travels in a circle with constant speed. The net force on the car is<br /> a. directed toward the center of the curve<br /> b. zero because the car is not accelerating<br /> c. directed forward, in the direction of travel<br /> d. none of them<br /> <br /> 12. Suppose the force of friction on a sliding object is 10 N. The force needed to maintain constant velocity is<br /> a. less than 10 N<br /> b. more than 10 N<br /> c. 10 N<br /> d. 0 N<br /> <br /> 13. An apple weighs 1 N. The net force on the apple when it is at rest on top of your head is<br /> a. 0 N<br /> b. 0.1 N<br /> c. 1 N<br /> d. 10 N<br /> <br /> 14. An apple weighs 1 N. The net force on the apple when it is in free fall is<br /> a. 0 N<br /> b. 0.1 N<br /> c. 1 N<br /> d. 10 N<br /> <br /> 15. An unfortunate bug splatters against the windshield of a moving car. Compared to the force on the bug, the force on the car is<br /> a. greater<br /> b. smaller<br /> c. the same<br /> <br /> 16. An unfortunate bug splatters against the windshield of a moving car. Compared to the acceleration of the bug, the acceleration of the car is<br /> a. greater<br /> b. smaller<br /> c. the same<br /> <br /> 17. Two figure skaters who push off each other will move at the same speed if<br /> a. they push with the same force<br /> b. the ice does not cause any friction<br /> c. there is no air resistance<br /> d. they have the same mass<br /> <br /> 18. When two equal forces act on the same object in opposite directions, the net force is<br /> a. smaller than either force<br /> b. equal to each of the forces<br /> c. zero<br /> d. greater than either force<br /> <br /> 19. A tennis ball and a solid steel ball of the same size are dropped at the same time. Which ball has the greater force acting on it?<br /> a. the tennis ball<br /> b. the steel ball<br /> c. the same force is acting on them<br /> <br /> 20. A tennis ball and a solid steel ball of the same size are dropped at the same time. Which ball has the greater acceleration? (assuming that the air resistance is negligible)<br /> a. the tennis ball<br /> b. the steel ball<br /> c. they have the same acceleration<br /> <br /> 21. A ball rolling across the floor slows to a stop because<br /> a. the forces are balanced<br /> b. the net force equals zero<br /> c. there is a net external force acting on it<br /> d. the force that started it moving wears out<br /> <br /> 22. The momentum of an object is defined as the object’s<br /> a. mass times its velocity<br /> b. mass times its acceleration<br /> c. force times its acceleration<br /> d. force times the time interval<br /> <br /> 23. The momentum change of an object is equal to the<br /> a. force acting on it<br /> b. impulse acting on it<br /> c. velocity change of the object<br /> d. force acting on its times its velocity<br /> <br /> 24. Momentum of a system is conserved only when<br /> a. the system is not moving<br /> b. there are no forces acting on the system<br /> c. there is no net external force acting on the system<br /> d. there are no internal forces acting on the system<br /> <br /> 25. When the velocity of a moving object is doubled<br /> a. its momentum is doubled<br /> b. its acceleration is doubled<br /> c. its kinetic energy is doubled<br /> d. its potential energy is doubled<br /> <br /> 26. A rifle recoils from firing a bullet. The speed of the rifle’s recoil is small because the<br /> a. momentum is conserved<br /> b. rifle is more massive than the bullet<br /> c. force against the rifle is relatively small<br /> d. impulse on the rifle is less than the impulse on the bullet<br /> <br /> 27. In physics, work is done<br /> a. in pushing against the wall<br /> b. in preparing school lessons<br /> c. in supporting an object on your shoulder<br /> d. in lifting an object from the floor to the table<br /> <br /> 28. An object at rest may have<br /> a. velocity<br /> b. momentum<br /> c. kinetic energy<br /> d. potential energy<br /> <br /> 29. An object in motion need not have<br /> a. velocity<br /> b. momentum<br /> c. kinetic energy<br /> d. potential energy<br /> <br /> 30. What never changes when two or more objects collide in the absence of a net external force is<br /> a. the momentum of each one<br /> b. the kinetic energy of each one<br /> c. the total momentum of all objects<br /> d. the total kinetic energy of all objects<br /> <br /> 31. The amount of potential energy possessed by an elevated object is equal to<br /> a. the distance it is lifted<br /> b. the force needed to lift it<br /> c. the power used to lift it<br /> d. the work done in lifting it<br /> <br /> 32. A freight train rolls along a track with considerable momentum. If it were to roll at the same speed but had twice as much mass, its momentum would be<br /> a. zero<br /> b. doubled<br /> c. quadrupled<br /> d. unchanged<br /> <br /> 33. A job is done slowly and an identical job is done quickly. Both jobs require the same amount of work but different amounts of<br /> a. energy<br /> b. power<br /> c. both energy and power<br /> d. none of them<br /> <br /> 34. Which of the following statements is true about an object thrown upward under the influence of the earth’s gravity alone?<br /> a. kinetic energy increases – potential energy increases<br /> b. kinetic energy decreases – potential energy increases<br /> c. kinetic energy increases – potential energy decreases<br /> d. kinetic energy decreases – potential energy decreases<br /> <br /> 35. Which of the following statements is true regarding simple machines being used with the presence of friction?<br /> a. work input is always greater than work output<br /> b. work input is always smaller than work output<br /> c. work input is always equal to the work output<br /> d. cannot be determined<br /> <div> <br /></div>

LET Reviewer - PHYSICAL SCIENCE (MECHANICS) Set 2

Majorship LET Reviewer LET Reviewer for Physical Science   PRACTICE TEST IN PHYSICAL SCIENCE ( MECHANICS ) 1. According to Newton’s...

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LET Reviewer - PHYSICAL SCIENCE (MECHANICS)

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td style="text-align: center;"><a href="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for Physical Science" border="0" src="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" title="LET Reviewer for Physical Science" /></a></td></tr> <tr><td class="tr-caption" style="text-align: center;">LET Reviewer for Physical Science</td></tr> </tbody></table>  <b>PRACTICE TEST IN PHYSICAL SCIENCE (<i>MECHANICS</i>)</b><br /> <div> <br /> 1. The radius of the path of an object in uniform circular motion is doubled. The centripetal force needed if its speed remains the same is ________.<br /> A. Four times as before<br /> B. Half as great as before<br /> C. Twice as much<br /> D. Three times as much<br /> <br /> 2. Car A has a mass of 1000kg and a speed of 60km/hr. car B has amass of 2000kg and a speed of 30km/hr. compare the kinetic energy foe car A with that of car B.<br /> A. Half as much<br /> B. Four times as much<br /> C. Equal<br /> D. Twice as much<br /> <br /> 3. What would be the horizontal line in a position-time graph means?<br /> A. Changing position, constant velocity<br /> B. Constant position, constant velocity<br /> C. Changing position, increase velocity<br /> D. Constant position, zero velocity<br /> <br /> 4. What is the car’s acceleration if ten seconds after the starting from rest; it is moving at 40m/s?<br /> A. 4.0m/s^2<br /> B. 10m/s^2<br /> C. 2.5m/s^2<br /> D. 0.25m/s^2<br /> <br /> 5. A heavy object and a light object are released from the rest at the same height and time in a vacuum. As they fall, they have equal ________.<br /> A. Weights<br /> B. Moments<br /> C. Acceleration<br /> D. Energies<br /> <br /> 6. Airplanes are designed with pointed nose and thin tails in order to__________.<br /> A. Produce fluid friction<br /> B. Reduce drag<br /> C. Increase the lift of the wing<br /> D. Lessen the forward thrust<br /> <br /> 7. A stone was thrown upward from the roof, at the same time that an identical stone was dropped from there. The two stones will ________.<br /> A. Have the same velocity upon reaching the ground<br /> B. Take the same time to reach the ground<br /> C. Have they same acceleration when they reach the ground<br /> D. Reach the ground at the same time<br /> <br /> 8. In a pair of scissors, the fulcrum is located at the ________.<br /> A. Handle<br /> B. Screw<br /> C. Tip of the blades<br /> D. Sharp edges<br /> <br /> 9. What kind of energy is possessed by water falling from a dam?<br /> A. Potential<br /> B. Kinetic<br /> C. Accelerating<br /> D. Interacting<br /> <br /> 10. If an object were equipped with a speedometer and allowed to fall freely on a planet where the acceleration due to gravity is 20m/s2, by, how much will the reading on the speedometer increase each second?<br /> A. 30m/s<br /> B. 20m/s<br /> C. 40m/s<br /> D. 10m/s<br /> <br /> 11. According to the kinetic molecular theory, liquids are similar in solids in that _______.<br /> A. Their molecules are arrange in a regular manner<br /> B. The motion of their particles changes with temperature<br /> C. The motion of their particles cannot be determined<br /> D. There is very little space in their molecules<br /> <br /> 12. When the solid block of materials is cut in half, its density is ________.<br /> A. Unchanged<br /> B. Halves<br /> C. Doubled<br /> D. Tripled<br /> <br /> 13. A ball is launched at an angle of 60 degrees from the horizontal. What do you call the horizontal distance traveled by the ball?<br /> A. Trajectory<br /> B. Projectile<br /> C. Range<br /> D. Hyperbola<br /> <br /> 14. Which of the following is TRUE about an object thrown horizontally?<br /> A. The vertical distance traveled increases uniformly<br /> B. The horizontal motion is uniformly accelerated<br /> C. The horizontal component of velocity increases<br /> D. The velocity of the subject increases<br /> <br /> 15. In the absence of the air resistance, a projectile has a maximum range when thrown at an angle of __________.<br /> A. 90 degrees<br /> B. 60 degrees<br /> C. 30 degrees<br /> D. 45 degrees<br /> <br /> 16. A 400 N woman stands on top of a very tall ladder so she is one earth radius above the earth’s surface. How much does she weights?<br /> A. 100N<br /> B. Zero<br /> C. 200N<br /> D. 400N<br /> <br /> 17. What must be the minimum length of the plane mirror in order for you to see a full view of yourself?<br /> A. Your full height<br /> B. One-fourth<br /> C. One-half<br /> D. Three-fourths<br /> <br /> 18. A rifle recoils from firing a bullet. The speed of the recoil is slow because ___________.<br /> A. The force against the rifle is less<br /> B. The rifle has more mass than the bullet<br /> C. The impulse on the rifle is less<br /> D. The momentum of the rifle is unchanged.<br /> <br /> 19. Which statements differentiate weight for mass?<br /> A. Weight is distance from a reference point<br /> B. Weight has volume, mass has none<br /> C. Weight is a full of gravity, mass is space occupied<br /> D. Weight is a force while mass is amount of matter<br /> <br /> 20. Who established the relationship between the volume of a gas and the pressure when the temperature is constant?<br /> A. Blaise Pascal<br /> B. Robert Boyle<br /> C. Lavoisier<br /> D. Archimedes<br /> <br /> 21. Which of the following quantities is a scalar quantity?<br /> a. momentum<br /> b. work<br /> c. force<br /> d. acceleration<br /> <br /> 22. An airplane travels east for 2 hours at a rate of 500km/h. Which of the following quantities is a vector?<br /> a. the time of travel<br /> b. the displacement<br /> c. the distance traveled<br /> d. the speed of the plane<br /> <br /> 23. Which of the following is the best definition of velocity?<br /> a. It is a description of the motion of a body.<br /> b. It is a measure of how fast a body is moving.<br /> c. It is the speed of a body and its direction of motion.<br /> d. It is equal to the distance traveled divided by the time of travel.<br /> <br /> 24. The speedometer of a car gives you a reading of the car’s<br /> a. instantaneous speed<br /> b. instantaneous velocity<br /> c. average speed<br /> d. average velocity<br /> <br /> 25. Acceleration is defined as the change in<br /> a. velocity divided by the time interval<br /> b. distance divided by the time interval<br /> c. time it takes to move from one place to another place<br /> d. time it takes to move from one speed to another speed<br /> <br /> 26. Which of the following situations describes a body that is accelerating?<br /> a. a truck that is at rest<br /> b. a car rounding a curve at constant speed<br /> c. a bicycle moving at constant speed along a straight highway<br /> d. none of the above<br /> <br /> 27. Which of the following statements is always true?<br /> a. when the acceleration is constant, the velocity is zero<br /> b. when the acceleration is zero, the velocity is also zero<br /> c. when the velocity is constant, the acceleration is zero<br /> d. when the instantaneous velocity is zero, the acceleration is also zero<br /> <br /> 28. A truck is moving along a straight highway. As it approaches an intersection, the driver steps on the brakes, bringing the car to a complete stop. Which of the following statements is true about the motion of the truck?<br /> a. the velocity and acceleration have opposite directions<br /> b. the velocity and acceleration have the same directions<br /> c. the velocity and acceleration of the truck are both constant<br /> d. none of the above<br /> <br /> 29. The acceleration of a stone thrown upward is<br /> a. the same as that of a stone thrown downward<br /> b. greater than that of a stone thrown downward<br /> c. smaller than that of a stone thrown downward<br /> d. zero until it reaches the highest point in its motion<br /> <br /> 30. For an object that is dropped from rest,<br /> a. the speed is proportional to the time of fall<br /> b. the acceleration is proportional to the time of fall<br /> c. the distance traveled is proportional to the time of fall<br /> d. all of the above<br /> <br /> 31. If a freely falling object were somehow equipped with a speedometer, its speed reading wound increase each second by<br /> a. about 5 m/s<br /> b. about 10 m/s<br /> c. about 15/s<br /> d. a variable amount<br /> <br /> 32. An object at rest maintains its state of rest unless acted upon by a net force because of its<br /> a. mass<br /> b. momentum<br /> c. inertia<br /> d. energy<br /> <br /> 33. An object in uniform motion maintains its state of motion unless acted upon by a net force because of its<br /> a. mass<br /> b. momentum<br /> c. inertia<br /> d. energy<br /> <br /> 34. A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is pulled quickly. The reason this can be done is that<br /> a. the milk carton has inertia<br /> b. the milk carton has very little weight<br /> c. gravity pulls very hard on the milk carton<br /> d. there are action and reaction forces<br /> <br /> 35. If the force of gravity suddenly stopped acting on the planets, they would<br /> a. spiral slowly toward the sun<br /> b. spiral slowly away from the sun<br /> c. fly straight away from the sum<br /> d. move in a straight line tangent to their orbit<br /> <div> <br /></div> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://adf.ly/1Bi9Ht" target="_blank"><img alt="Physical Science" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a></div>

LET Reviewer - PHYSICAL SCIENCE (MECHANICS)

Majorship LET Reviewer LET Reviewer for Physical Science   PRACTICE TEST IN PHYSICAL SCIENCE ( MECHANICS ) 1. The radius of the pa...

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LET Reviewer - PHYSICAL SCIENCE (OPTICS)

<div class="bluebox"> Majorship LET Reviewer</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for Physical Science" border="0" src="http://3.bp.blogspot.com/-UY4G8SqCtig/VQwi3JhZLnI/AAAAAAAABK0/1je5K_7YKrI/s1600/mcqs-physics.jpg" title="LET Reviewer for Physical Science" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for Physical Science</td></tr> </tbody></table>  <b>PRACTICE TEST</b><b> IN PHYSICAL SCIENCE (OPTICS)</b><br /> <br /> 1. Which of the following is Sir Isaac Newton’s theory that explains light as a particle?<br /> a. Corpuscular Theory<br /> b. Electromagnetic Wave Theory<br /> c. Quantum Theory<br /> d. Wave Theory<br /> <br /> 2. When light hits a smooth surface, it is<br /> a. bent around corners<br /> b. polarized<br /> c. reflected<br /> d. refracted<br /> <br /> 3. A ray of light is reflected from a plane mirror. The angle of incidence is 20 degress. The angle between the incident and the reflected ray is<br /> a. 10 degrees<br /> b. 20 degrees<br /> c. 30 degrees<br /> d. 40 degrees<br /> <br /> 4. What kind of mirror is used in automobile and trucks to give the driver a wider area and smaller image of the traffic behind him/her?<br /> a. concave mirror<br /> b. convex mirror<br /> c. plane mirror<br /> d. none of these<br /> <br /> 5. The image in a plane mirror is always<br /> a. erect but reversed.<br /> b. erect but not reversed.<br /> c. inverted and reversed.<br /> d. inverted but not reversed.<br /> <br /> 6. When rays parallel to the principal axis of a concave mirror are reflected, they pass through<br /> a. any point on the axis..<br /> b. the principal focus.<br /> c. the center of curvature of the mirror.<br /> d. the point halfway between the focus and the mirror.<br /> <br /> 7. A stick partly submerged obliquely in water appears to be bent at a point where it enters the water surface. Which one of the following gives explanation for this observation?<br /> a. Dispersion of light on entering water<br /> b. Light does not travel in straight line in water.<br /> c. Diffraction of light by the surface of the water<br /> d. Refraction of light due to differences in speed of light in air<br /> <br /> 8. The principle involved in the formation of images on lenses is<br /> a. aberration.<br /> b. dispersion.<br /> c. reflection.<br /> d. refraction.<br /> <br /> 9. A diamond is a brilliant gem because<br /> a. it has low index of refraction.<br /> b. it has big critical angle.<br /> c. most of the light is refracted.<br /> d. most of the light is reflected internally.<br /> <br /> 10.When light travels from air to glass its speed<br /> a. increases.<br /> b. decreases.<br /> c. remains the same.<br /> d. increases then decreases.<br /> <br /> 11.The property of light responsible for the formation of colors is<br /> a. amplitude.<br /> b. quality.<br /> c. velocity.<br /> d. wavelength.<br /> <br /> 12.Which of the following statements is NOT true about the dispersion of sunlight by a prism?<br /> a. The color most bent is red.<br /> b. White light consists of waves of varying length.<br /> c. Different wavelengths travel with different speed.<br /> d. Different wavelengths correspond to different colors.<br /> <br /> 13.After a rainstorm, a rainbow may appear in the sky. Which statement explains this observation?<br /> a. Raindrops act as prisms separating sunlight into colors.<br /> b. The white clouds are actually prisms composed of different colors.<br /> c. The colors of the rainbow come from raindrops in the atmosphere.<br /> d. When the sunlight is reflected by the ground towards the clouds, it separates into different colors.<br /> <br /> 14.A piece of coal appears black when viewed in sunlight because it __________ all the light that falls on it.<br /> a. absorbs<br /> b. disperses<br /> c. reflects<br /> d. transmits<br /> <br /> 15.A red rose appears red because of its ability to<br /> a. absorb the red color and reflect all others.<br /> b. reflect the red color and absorb all others.<br /> c. transmit all colors except red.<br /> d. transmit the red color and reflect all others.<br /> <br /> 16.Diffraction of light means that<br /> a. light is a transverse wave.<br /> b. light is reflected from a film.<br /> c. light bends as it enters a different medium.<br /> d. light bends as it passes through a small opening.<br /> <br /> 17.The sun appears to be more reddish at sunset than at noon. Which of the following phenomena is responsible for this effect?<br /> a. dispersion<br /> b. interference<br /> c. reflection<br /> d. scattering<br /> <br /> 18.Which property of light produces bright and dark bands on a screen after light from a source passes through two very narrow slits that are near each other?<br /> a. dispersion<br /> b. interference<br /> c. polarization<br /> d. refraction<br /> <br /> 19.When sunlight falls on soap bubble, the band of colors seen is due to<br /> a. dispersion.<br /> b. interference.<br /> c. pigments of soap.<br /> d. refraction.<br /> <br /> 20.Polarization of light is an evidence that light<br /> a. is a transverse wave.<br /> b. is a longitudinal wave.<br /> c. has a particle property.<br /> d. wave can destructively interfere with each other.<br /> <br /> 21. The theory that explains light as a particle.<br /> a. corpuscular theory<br /> b. electromagnetic wave theory<br /> c. quantum theory<br /> d. wave theory<br /> <br /> 22. When we see a tree, the light that reaches our eyes<br /> a. has been reflected by the tree.<br /> b. has been refracted by the tree.<br /> c. has been separated into a spectrum by the tree.<br /> d. has undergone interference in passing through the tree.<br /> <br /> 23. Enlarged image can be formed by<br /> a. concave mirrors only<br /> b. convex mirrors only<br /> c. either concave or convex mirror<br /> d. neither concave nor convex mirror<br /> <br /> 24. The image formed by a convex mirror is always<br /> a. real<br /> b. inverted<br /> c. bigger than the object<br /> d. smaller than the object<br /> <br /> 25. If you are looking obliquely on a fish under water, in what direction should you aim your arrow to hit it?<br /> a. above the fish<br /> b. below the fish<br /> c. directly to the fish<br /> d. either below or above the fish<br /> <br /> 26. The term refraction refers to<br /> a. the bending of light rays when they strike a mirror.<br /> b. the bending of light rays when they enter a different medium.<br /> c. the fact that white light is made up of many colors.<br /> d. the fact that light travels in straight line in uniform medium.<br /> <br /> 27. As the angle of incidence increases, the index of refraction of a medium<br /> a. increases<br /> b. decreases<br /> c. remains unchanged<br /> d. none of the above<br /> <br /> 28. If you look down on a pool of still water, you see your face clearly. Which one of the following gives the best explanation for this observation?<br /> a. Dispersion of light on entering water<br /> b. Reflection of light by the surface of the water<br /> c. Refraction of light by the surface of the water<br /> d. Light is reflected from the surface of the water in different directions.<br /> <br /> 29. A diamond is a brilliant gem because<br /> a. it has low index of refraction.<br /> b. it has big critical angle.<br /> c. most of the light is refracted.<br /> d. most of the light is reflected internally.<br /> <br /> 30.A ray of light is reflected from a plane mirror. The angle of incidence is 30 degrees. The angle between the incident and the reflected ray is<br /> a. 40 degrees<br /> b. 60 degrees<br /> c. 50 degrees<br /> d. 70 degrees<br /> <br /> 31.When you stand 3 meters in front of a full length mirror, your image is<br /> a. real and 1 meters behind the mirror<br /> b. real and 3 meters behind the mirror<br /> c. virtual and 2 meters behind the mirror<br /> d. virtual and 3 meters behind the mirror<br /> <br /> 32.The bottom of a clear and deep lake appears to be shallow because of ____________<br /> a. diffraction<br /> b. polarization<br /> c. reflection<br /> d. refraction<br /> <br /> 33.When sunlight strikes raindrops, it passes through them and produces<br /> a. halo<br /> b. heat<br /> c. rainbow<br /> d. shadow<br /> <br /> 34.Side mirrors of motor vehicles allow the driver to see wider areas. What best describes the images compared to the real object in this kind of mirror?<br /> a. bigger<br /> b. smaller<br /> c. the same<br /> d. inverted<br /> <br /> 35.What do you call the separation of light into its component colors?<br /> a. dispersion<br /> b. polarization<br /> c. reflection<br /> d. refraction<br /> <br /> 36.Where does light travel fastest?<br /> a. air<br /> b. glass<br /> c. vacuum<br /> d. water<br /> <br /> 37.What do you call the bending of light around the corners of objects?<br /> a. diffraction<br /> b. dispersion<br /> c. reflection<br /> d. refraction<br /> <br /> 38.A beam of light traveling in air enters a glass medium. What changes does it undergo?<br /> a. change in speed only<br /> b. change in frequency only<br /> c. change in wavelength only<br /> d. change in both speed and wavelength<br /> <br /> 39.Which is the color of visible light with the longest wavelength?<br /> a. blue<br /> b. red<br /> c. violet<br /> d. yellow<br /> <br /> 40.Which of the following is a good description of a polarized light?<br /> a. It is an ordinary light.<br /> b. It is a transverse wave.<br /> c. It is a longitudinal wave.<br /> d. It is a wave that vibrates in all directions.<br /> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://adf.ly/1Bi9Vn" target="_blank"><img alt="Physical Science" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a>

LET Reviewer - PHYSICAL SCIENCE (OPTICS)

Majorship LET Reviewer LET Reviewer for Physical Science   PRACTICE TEST  IN PHYSICAL SCIENCE (OPTICS) 1. Which of the following is...

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LET Reviewer for SCIENCE (NATURAL SCIENCE)

<div class="bluebox"> LET Reviewer in General Education</div> <br /> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://4.bp.blogspot.com/-8BOymaD10BA/VQu3HwESwdI/AAAAAAAABJI/763fJcTC9ps/s1600/mcqs-general-education.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="LET Reviewer for General Education" border="0" src="http://4.bp.blogspot.com/-8BOymaD10BA/VQu3HwESwdI/AAAAAAAABJI/763fJcTC9ps/s1600/mcqs-general-education.jpg" title="LET Reviewer for General Education" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">LET Reviewer for General Education</td></tr> </tbody></table> <b>PRACTICE TEST FOR GENERAL EDUCATION</b><br /> <b><i>GENERAL | NATURAL SCIENCE</i></b><br /> <br /> 1. Which is not considered as adaptive mechanism of living things?<br /> a. Modification of body parts to suit the environment.<br /> b. Presence of specialized structures like thorns and fins.<br /> c. Possession of camouflage features like color, pattern or shape.<br /> d. Reproduction for the preservation of a certain species.<br /> <br /> 2. Biologists are at present involved in gene manipulation by altering the genes in nuclei. Which aims seem to be the most important of such manipulation?<br /> a. to cure ancient genetic diseases like cancer<br /> b. to prolong life<br /> c. to create new types of agricultural plants and animals<br /> d. to make significant changes in man himself<br /> <br /> 3. Which chemical substance produced by the body regulates and coordinates the functions and activities of bodily organ?<br /> a. gene<br /> b. Deoxyribonucleic acid<br /> c. hormone<br /> d. enzyme<br /> <br /> 4. Which endocrine abnormality is characterized by dwarfness, low intelligence and sex immaturity?<br /> a. myxedema<br /> b. cretinism<br /> c. tetany <br /> d. acromegaly<br /> <br /> 5. What is the present connotation of symbiosis?<br /> a. a give and take relationship of organism<br /> b. any type of relationship between two dissimilar organisms living together<br /> c. a one- sided relationship between two species<br /> d. neutral relationship that exist between two organisms<br /> <br /> 6. Living things are classified either as aerobic or anaerobic as they grow or metabolize in the presence or absence of:<br /> a. carbon dioxide<br /> b. nitrogen<br /> c. water<br /> d. oxygen<br /> <br /> 7. What is the structural difference between plants and animals?<br /> a. Plant cells have plastids but animal cells do not.<br /> b. Plant cells have a stiff cell wall of cellulose but animal cells do not.<br /> c. Animal cells have centriole but the cells of higher plants do not.<br /> d. Plant cells have only a thin membrane but animals do not.<br /> <br /> 8. Only living things can respond to stimuli, to physical and chemical changes in their environment. Such a characteristic is called:<br /> a. metabolism<br /> b. irritability<br /> c. movement<br /> d. specific organization<br /> <br /> 9. The preservation of specie is made possible through:<br /> a. reproduction<br /> b. adaptation<br /> c. metabolism<br /> d. growth<br /> <br /> 10. Which process involves in the movement of dissolved molecules (solute) through a differentially permeable membrane?<br /> a. diffusion<br /> b. osmosis<br /> c. Brownian movement<br /> d. dialysis<br /> <br /> 11. Which refers to the earth’s entire zone of air, land and water which occupied by living things?<br /> a. biosphere<br /> b. biome<br /> c. bioassay<br /> d. biomass<br /> <br /> 12. Which body organ is responsible for the removal of waste from the blood and body fluids?<br /> a. liver<br /> b. pancreas<br /> c. kidney<br /> d. large intestine<br /> <br /> 13. What is meant by excretion?<br /> a. Elimination of waste and undigested food from the anus.<br /> b. Removal from the cells and blood streams of substances which are no further use in the body.<br /> c. Release from the cell of some substance that is utilized elsewhere in some bodily process.<br /> d. Absorption of soluble food by the body cells.<br /> <br /> 14. The clotting of the blood is essentially the function of:<br /> a. red blood cells<br /> b. white corpuscles<br /> c. plasma<br /> d. hemoglobin<br /> <br /> 15. All living things have a tendency to maintain uniformity or stability in their internal environment called:<br /> a. anabolism<br /> b. metabolism<br /> c. epigenesist<br /> d. homeostasis<br /> <br /> 16. What is an ecosystem?<br /> a. A basic unit that shows interaction between living things and their environment.<br /> b. A recognizable unit which shows plant and animal distribution as influenced primarily by climate.<br /> c. A fundamental unit that shows various types of relationship among organism.<br /> d. A distinct unit that shows how physical factor can affect other abiotic components in the environment.<br /> <br /> 17. Which plant structure transports organic nutrients both up and down the stem and roots?<br /> a. xylem<br /> b. vascular bundle <br /> c. parenchyma<br /> d. phloem<br /> <br /> 18. Under what condition does a living organism live best or has the greatest chance of survival?<br /> a. maximal<br /> b. minimal<br /> c. optimum<br /> d. standard<br /> <br /> 19. Which traps light energy from the sun for use in the photosynthesis?<br /> a. carbon dioxide<br /> b. water<br /> c. chlorophyll<br /> d. oxygen<br /> <br /> 20. Smoking cigarettes:<br /> a. causes ulcer<br /> b. decreases the vital capacity of the stomach<br /> c. leads to emphysema and lung cancer<br /> d. leads to abnormal life<br /> <br /> 21. Blood cells and plasma factors are important:<br /> a. immune defense<br /> b. invaders<br /> c. external defenses<br /> d. internal defenses<br /> <br /> 22. A spinal nerve is:<br /> a. motor nerve<br /> b. sensory nerve<br /> c. neuron<br /> d. mixed nerve<br /> <br /> 23. The anterior pituitary stimulates the:<br /> a. motor coordination<br /> b. consciousness<br /> c. sense reception<br /> d. homeostasis<br /> <br /> 24. What do all methods of birth control have in common?<br /> a. they all use some device<br /> b. they are all expensive<br /> c. they interrupt lovemaking<br /> d. they prevent the egg from coming in contact with the sperm<br /> <br /> 25. Pregnancy begins:<br /> a. upon successful implantation <br /> b. during the follicular phase <br /> c. when the egg is fertilized<br /> d. when ovulation occurs<br /> <br /> 26. The fact that many insects are now immune to DDT is an example of:<br /> a. natural selection<br /> b. genetic drift<br /> c. geographical isolation<br /> d. translocation<br /> <br /> 27. The nutrient glucose is useful to the body:<br /> a. to prevent goiter <br /> b. as a source of energy <br /> c. active reabsorption<br /> d. during the process of respiration<br /> <br /> 28. Radiant energy is covered into chemical energy during:<br /> a. oxidation<br /> b. glycosis<br /> c. respiration<br /> d. photosynthesis<br /> <br /> 29. Which of the following is not a form of vegetative reproduction?<br /> a. regeneration<br /> b. budding<br /> c. spore formation<br /> d. vegetation by runners<br /> <br /> 30. Nitrogenous waste is produced by the metabolism of:<br /> a. fats <br /> b. carbohydrates<br /> c. proteins<br /> d. starches<br /> <br /> 31. Which of the following is a reflex act?<br /> a. breathing<br /> b. blinking<br /> c. walking<br /> d. sleeping<br /> <br /> 32. In an ecosystem:<br /> a. only energy is recycled <br /> b. only materials are recycled <br /> c. both materials and energy are recycled<br /> d. neither materials nor energy is recycled<br /> <br /> 33. Distribution of plants is affected by:<br /> a. type of soil<br /> b. amount of light<br /> c. amount of rainfall<br /> d. A, B, and C are correct<br /> <br /> 34. Which decoction contains traces of iron to arrest hemorrhage?<br /> a. corn silk<br /> b. ampalaya leaves flowers<br /> c. gumamela<br /> d. coconut milk<br /> <br /> 35. Hyperacidity can destroy the lining of the stomach. Which of the following substance can ease the discomfort?<br /> a. water therapy<br /> b. milk of magnesia<br /> c. starch solution<br /> d. gelatin<br /> <br /> 36. Deficiency of carbohydrates is characterized by:<br /> a. sluggishness<br /> b. pallor<br /> c. obesity<br /> d. bone deformation<br /> <br /> 37. Salt as a preservative causes:<br /> a. cell shrinkage<br /> b. ionization<br /> c. hydrolysis<br /> d. hydration<br /> <br /> 38. What do you call the practical or industrial application based on scientific principles?<br /> a. scientific method<br /> b. technology<br /> c. theory <br /> d. experimentation<br /> <br /> 39. What is the principal cause of earthquakes?<br /> a. faulting <br /> b. landslides<br /> c. nuclear explosions<br /> d. volcanic eruptions<br /> <br /> 40. Purification of metals can be done best by:<br /> a. filtration <br /> b. flotation<br /> c. aeration<br /> d. electrolysis<br /> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://adf.ly/1Bi1kF" target="_blank"><img alt="Natural Science" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a>

LET Reviewer for SCIENCE (NATURAL SCIENCE)

LET Reviewer in General Education LET Reviewer for General Education PRACTICE TEST FOR GENERAL EDUCATION GENERAL | NATURAL SCIENCE ...

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MCQs / Compilation of Physics Problems Part 7

<h1 style="font-size: 20px; text-align: center;"> </h1> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs / Compilation of Physics Problems" border="0" src="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" title="MCQs / Compilation of Physics Problems" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">MCQs / Compilation of Physics Problems</td></tr> </tbody></table> <b>PRACTICE TEST IN PHYSICS SET</b><b> 7</b><br /> <br /> 1.<span class="Apple-tab-span" style="white-space: pre;"> </span>A current of 5 A passes along a wire of length 1.0 m. the wire is at right angles to a magnetic field of flux density of 0.15 T. The force acting on the wire is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>0.03 N<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>0.75 N<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>33 N<br /> <br /> 2.<span class="Apple-tab-span" style="white-space: pre;"> </span>The end product of most radioactive decay series is usually some form of<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>carbon<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>helium<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>hydrogen<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>lead<br /> <br /> 3.<span class="Apple-tab-span" style="white-space: pre;"> </span>The cause of surface tension is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>adhesive forces<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>cohesive forces<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>external forces<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>gravitational force<br /> <br /> 4.<span class="Apple-tab-span" style="white-space: pre;"> </span>The unit 'poise' is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne.sec/cm2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne.cm/sec2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>newton.sec/m2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne.sec/cm<br /> <br /> 5.<span class="Apple-tab-span" style="white-space: pre;"> </span>Emission line spectrum will be obtained from...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>candle flame<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>sodium lamp<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Sun<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>white hot filament of an electric bulb<br /> <br /> 6.<span class="Apple-tab-span" style="white-space: pre;"> </span>A hollow insulated brass sphere is positively charged. The electric potential inside the sphere is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>greater than the potential at the surface<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>smaller than the potential at the surface<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>the same as that on the surface<br /> <br /> 7.<span class="Apple-tab-span" style="white-space: pre;"> </span>The linear momentum of a body is P = a + (bt2/2). The force acting on the body is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>a + (bt/2)<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>a + bt<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>bt/2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>bt<br /> <br /> 8.<span class="Apple-tab-span" style="white-space: pre;"> </span>The weight of a body on the surface of earth is 100 N. Its weight at a depth half way to the centre of earth will be...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>50 N<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>100 N<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>25 N<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>125 N<br /> <br /> 9.<span class="Apple-tab-span" style="white-space: pre;"> </span>Two wires C and D of the length in the ratio 2 : 3, diameter in the ratio 2 : 3 and of the same material, are subjected to same force. Then the ratio of their extentions lc : ld is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 : 2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>2 : 3<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>4 : 9<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>8 : 27<br /> <br /> 10.<span class="Apple-tab-span" style="white-space: pre;"> </span>The potential energy of a harmonic oscillator is maximum when the displacement is equal to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1/2 amplitude<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>amplitude<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>1/4 amplitude<br /> <br /> 11.<span class="Apple-tab-span" style="white-space: pre;"> </span>When the forces acting on a body are in equilibrium, its...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>velocity is zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>displacement is zero<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>acceleration is zero<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>momentum is zero<br /> <br /> 12.<span class="Apple-tab-span" style="white-space: pre;"> </span>An object at rest may possess...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>velocity<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>momentum<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>kinetic energy<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>potential energy<br /> <br /> 13.<span class="Apple-tab-span" style="white-space: pre;"> </span>A nonconservative force does not give rise to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>thermal energy<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>kinetic energy<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>light energy<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>potential energy<br /> <br /> 14.<span class="Apple-tab-span" style="white-space: pre;"> </span>Atoms forming a molecule attain the arrangement in which they obtain...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero potential energy<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>minimum potential energy<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>maximum potential energy<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>none of the above<br /> <br /> 15.<span class="Apple-tab-span" style="white-space: pre;"> </span>Bulk modulus of a liquid is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>higher than that for a solid<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>higher than that for a gas<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>lower than that for a gas<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> <br /> 16.<span class="Apple-tab-span" style="white-space: pre;"> </span>The CGS unit of coefficient of viscosity is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne.second/cm2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>newton.second/cm2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne.(second)2/cm2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>newton.second/cm<br /> <br /> 17.<span class="Apple-tab-span" style="white-space: pre;"> </span>The volume of a gas sample is directly proportional to its...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>Fahrenheit temperature<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>Celsius temperature<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Kelvin temperature<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>pressure<br /> <br /> 18.<span class="Apple-tab-span" style="white-space: pre;"> </span>The approximate relationship between the coefficient of linear expansion(α) and the coefficient of cubical expansion(γ) is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>γ = α2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>γ = α3<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>α = 3 γ<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>γ = 3 α<br /> <br /> 19.<span class="Apple-tab-span" style="white-space: pre;"> </span>When capacitors are in parallel...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>they are all at the same potential<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>they are at different potentials<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>their capacitances are equal<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>the equivalent capacitance is zero<br /> <br /> 20.<span class="Apple-tab-span" style="white-space: pre;"> </span>The earth's magnetic field at sea level is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 x 10-9 T<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 x 109 T<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 x 10-5 T<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 x 105 T<br /> <br /> 21.<span class="Apple-tab-span" style="white-space: pre;"> </span>Monoatomic gases give...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>line spectra<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>band spectra<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>continuous spectra<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>line and band spectra<br /> <br /> 22.<span class="Apple-tab-span" style="white-space: pre;"> </span>The centre of mass of a rigid body...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>lies inside the body<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>lies outside the body<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>can be inside or outside of the body<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>may not exist<br /> <br /> 23.<span class="Apple-tab-span" style="white-space: pre;"> </span>If 'l' is the length of a simple pendulum and 'T' its period, then 'g' is given by...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>(4π2l)/T2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>2π/(√ l/t)<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>2πl/t<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>(4πl2)/t2<br /> <br /> 24.<span class="Apple-tab-span" style="white-space: pre;"> </span>The rate at which an object radiates electromagnetic energy does not depend on its...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>surface area<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>mass<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>temperature<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>ability to absorb radiation<br /> <br /> 25.<span class="Apple-tab-span" style="white-space: pre;"> </span>Which of the following is neither a basic physical law nor derivable from one?<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>Coulomb's law<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>Ohm's law<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Kirchhoff's first law<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>Kirchhoff's second law<br /> <br /> 26.<span class="Apple-tab-span" style="white-space: pre;"> </span>The power dissipated as heat in an a.c. circuit depends on its...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>resistance<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>inductive reactance<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>capacitive reactance<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>impedance<br /> <br /> 27.<span class="Apple-tab-span" style="white-space: pre;"> </span>Impedance is a maximum at resonance in...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>a series RLC circuit<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>a parallel RLC circuit<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>all RLC circuits<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>no RLC circuit<br /> <br /> 28.<span class="Apple-tab-span" style="white-space: pre;"> </span>Red shift indicates...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>recession of star<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>approaching movement of star<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>that red light changes to violet<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>that violet light changes to red<br /> <br /> 29.<span class="Apple-tab-span" style="white-space: pre;"> </span>The penetration power of beta particles is 1. Then the relative penetration power of gamma rays is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>1<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>100<br /> C.  1/1000<br /> D.  1000<br /> <br /> 30.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a common-base circuit the current gain is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>greater than 1<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>smaller than 1<br /> <br /> Hover your cursor/pointer on the dark area below to reveal answers.<br /> <br /> <div class="postspoiler"> ANSWERS TO SET # 7<br /> 01)C 02)D 03)B 04)A 05)B<br /> 06)D 07)D 08)A 09)A 10)C<br /> 11)C 12)D 13)D 14)B 15)B<br /> 16)A 17)C 18)D 19)A 20)C<br /> 21)A 22)C 23)A 24)B 25)B<br /> 26)A 27)B 28)A 29)B 30)D </div>

MCQs / Compilation of Physics Problems Part 7

MCQs / Compilation of Physics Problems PRACTICE TEST IN PHYSICS SET  7 1. A current of 5 A passes along a wire of length 1.0 m. the...

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MCQs / Compilation of Physics Problems Part 6

<h1 style="font-size: 20px; text-align: center;"> </h1> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs / Compilation of Physics Problems" border="0" src="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" title="MCQs / Compilation of Physics Problems" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">MCQs / Compilation of Physics Problems</td></tr> </tbody></table> <b>PRACTICE TEST IN PHYSICS SET</b><b> </b><b>6</b><br /> <br /> 1.<span class="Apple-tab-span" style="white-space: pre;"> </span>The equation applicable in the adiabatic process of n mole ideal gas is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>ΔU = nCpΔT<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>ΔU = nCvΔT<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>ΔQ = nCvΔT<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>ΔQ = nCpΔT<br /> <br /> 2.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a Carnot's engine, the working substance is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>ideal gas<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>steam<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>petrol<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>CO2<br /> <br /> 3.<span class="Apple-tab-span" style="white-space: pre;"> </span>Two particles A and b initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of centre of mass of the system is<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>v<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>1.5v<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>3v<br /> <br /> 4.<span class="Apple-tab-span" style="white-space: pre;"> </span>Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. The gravitational force of attraction between the planet and the star is proportional to R(-5/2), then T2 is proportional to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>R3<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>R(7/2)<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>R(3/2)<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>R3.75<br /> <br /> 5.<span class="Apple-tab-span" style="white-space: pre;"> </span>Electrical conductivity increases with the increase in temperature of...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>P-type semiconductor<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>N-type semiconductor<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>intrinsic semiconductor<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>none<br /> <br /> 6.<span class="Apple-tab-span" style="white-space: pre;"> </span>Amount of charge in coulomb required to deposit one gram equivalent of substance by electrolysis is...<br /> A.  96500<br /> B.  48 x 10-10<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>6 x 1024<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>9600<br /> <br /> 7.<span class="Apple-tab-span" style="white-space: pre;"> </span>A camera lens is adjusted to f/4 and has an effective diameter of 2.0 cm. Its focal length is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0.2 cm<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1.6 cm<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>2.0 cm<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>8.0 cm<br /> <br /> 8.<span class="Apple-tab-span" style="white-space: pre;"> </span>The self inductance of a long solenoid is directly affected by changes in all but...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>the number of turns<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>the current<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>the area of cross section<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>the relative permeability of the core<br /> <br /> 9.<span class="Apple-tab-span" style="white-space: pre;"> </span>Which of the following is not the unit of energy ?<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>joule<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>erg<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>newton.metre<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>dyne<br /> <br /> 10.<span class="Apple-tab-span" style="white-space: pre;"> </span>All collisions conserve...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>kinetic energy<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>momentum<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>both kinetic energy and momentum<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>neither of kinetic energy and momentum<br /> <br /> 11.<span class="Apple-tab-span" style="white-space: pre;"> </span>If a rocket of initial mass m is to rise from its launching pad, its initial thrust must exceed...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>mg/2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>mg<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>2mg<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>mg2/2<br /> <br /> 12.<span class="Apple-tab-span" style="white-space: pre;"> </span>9 gram of water contains approximately...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>6 x 1023 molecules of water<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>6 x 1023 atoms of oxygen<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>6 x 1023 atoms of hydrogen<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>3 x 1023 atoms of hydrogen<br /> <br /> 13.<span class="Apple-tab-span" style="white-space: pre;"> </span>A cable can support a maximum load of W without exceeding the elastic limit. If it is replaced by a cable of same material but half as long and half the diameter, the elastic limit will not be exceeded by the new cable up to a load of...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>W/4<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>W/2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>W<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>2W<br /> <br /> 14.<span class="Apple-tab-span" style="white-space: pre;"> </span>Surface tension does not depend on...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>surface area<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>the type of liquid<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>temperature<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>medium in contact with the liquid<br /> <br /> 15.<span class="Apple-tab-span" style="white-space: pre;"> </span>-40° F is equal to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>-40° C<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>-8° C<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>-72° C<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>-104° C<br /> <br /> 16.<span class="Apple-tab-span" style="white-space: pre;"> </span>The magnitude of the field within a conductor...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>depends on the shape of the conductor<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>is always zero<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>is always positive<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>may be zero or positive<br /> <br /> 17.<span class="Apple-tab-span" style="white-space: pre;"> </span>A permanent magnet does not exert force on...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>an unmagnetized iron bar<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>a magnetized iron bar<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>a stationary electric charge<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>a moving electric charge<br /> <br /> 18.<span class="Apple-tab-span" style="white-space: pre;"> </span>A primary rainbow cannot be seen by an observer looking up if the altitude of the Sun exceeds...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>10°<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>20°<br /> C.  22.5°<br /> D.  40°<br /> <br /> 19.<span class="Apple-tab-span" style="white-space: pre;"> </span>According to the descending order of temperature the stars are classified in to the orders O,B,A,F,G,K and M. Our Sun comes in the order...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>A<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>B<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>G<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>K<br /> <br /> 20.<span class="Apple-tab-span" style="white-space: pre;"> </span>Position of the centre of mass of a rigid body depends on...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>its shape only<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>distribution of its matter only<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>both its shape and distribution of matter<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>its position relative to the earth.<br /> <br /> 21.<span class="Apple-tab-span" style="white-space: pre;"> </span>Force is to linear motion as _____ is to rotational motion.<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>acceleration<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>torque<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>moment of inertia<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>angular momentum<br /> <br /> 22.<span class="Apple-tab-span" style="white-space: pre;"> </span>A hole is drilled to the centre of the earth and a stone is dropped in to it. When the stone is at the earth's centre, compared to the values at the earth's surface...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>its mass and weight both change<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>its mass and weight both are zero<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>its mass is unchanged and its weight is zero<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>its mass is zero and its weight is unchanged<br /> <br /> 23.<span class="Apple-tab-span" style="white-space: pre;"> </span>For an IC engine, the thermal efficiency depends on...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>the compression ratio<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>the speed of the piston<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>the temperature of working medium<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>the diameter of the cylinder<br /> <br /> 24.<span class="Apple-tab-span" style="white-space: pre;"> </span>A 12-V potential difference is applied across a series combination of four 6-ohm resistors. The current in each resistor is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0.5 A<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>2 A<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>8 A<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>18 A<br /> <br /> 25.<span class="Apple-tab-span" style="white-space: pre;"> </span>The temperature at which the thermo emf becomes zero is known as the...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>neutral temperature<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>absolute temperature<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>inverse temperature<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>thermoelectric temperature<br /> <br /> 26.<span class="Apple-tab-span" style="white-space: pre;"> </span>A transformer uses the principle of...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>self-induction<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>mutual induction<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>variable resistance<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>electrostatic attraction<br /> <br /> 27.<span class="Apple-tab-span" style="white-space: pre;"> </span>If V and Vm are the instantaneous and maximum values, respectively , of voltage in an a.c. circuit, then the mean value of the voltage is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>Vm sinωt<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ 2 Vm<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Vm/√ 2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>none of the above<br /> <br /> 28.<span class="Apple-tab-span" style="white-space: pre;"> </span>Electromagnetic waves having wavelengths greater than 200 m are called...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>sky waves<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>ground waves<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>micro waves<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>X-rays<br /> <br /> 29.<span class="Apple-tab-span" style="white-space: pre;"> </span>If θm is the angle of diffracted wave with the direction of incidence and d is the width of slit, then mth order minima is obtained for sinθm equal to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>mλ/d<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>dλ/m<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>md/λ<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>m/λd<br /> <br /> 30.<span class="Apple-tab-span" style="white-space: pre;"> </span>As a sample of a radioactive element decays, its half-life...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>decreases<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>increases<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>remains the same<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>changes exponentially.<br /> <br /> Hover your cursor/pointer on the dark area below to reveal answers.<br /> <br /> <div class="postspoiler"> ANSWERS TO SET # 6<br /> <br /> (01) B (02) A (03) A (04) B (05) C<br /> (06) A (07) D (08) B (09) D (10) B<br /> (11) B (12) C (13) A (14) A (15) A<br /> (16) B (17) C (18) D (19) C (20) C<br /> (21) B (22) C (23) A (24) A (25) C<br /> (26) B (27) D (28) B (29) A (30) C </div>

MCQs / Compilation of Physics Problems Part 6

MCQs / Compilation of Physics Problems PRACTICE TEST IN PHYSICS SET   6 1. The equation applicable in the adiabatic process of n mo...

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MCQs / Compilation of Physics Problems Part 5

<h1 style="font-size: 20px; text-align: center;"> </h1> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs / Compilation of Physics Problems" border="0" src="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" title="MCQs / Compilation of Physics Problems" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">MCQs / Compilation of Physics Problems</td></tr> </tbody></table> <b>PRACTICE TEST IN PHYSICS SET</b><b> 5</b><br /> <div> <br /></div> <div> 1.<span class="Apple-tab-span" style="white-space: pre;"> </span>T is the period of oscillation for a spring-mass system on earth. Its period on moon is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>T</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>6T</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>T/6</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ 6T</div> <div> <br /></div> <div> 2.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a stretched string, the speed of waves depends on...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>the tension in the string</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>the amplitude</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>the wavelength</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>the acceleration due to gravity</div> <div> <br /></div> <div> 3.<span class="Apple-tab-span" style="white-space: pre;"> </span>For a plane curved path with radius of curvature R without slope the maximum safe velocity of the vehicle(v) is proportional to...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>R</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>R2</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>√R</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>1/R</div> <div> <br /></div> <div> 4.<span class="Apple-tab-span" style="white-space: pre;"> </span>Two projectiles A and B are projected with same initial velocity. The direction of A makes an angle αA = π/4 with the horizontal.The direction of B makes an angle αB with the horizontal. The range of A will be double that of B for αB equal to...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>π/8</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>π/2</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>π/3</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>π/12</div> <div> <br /></div> <div> 5.<span class="Apple-tab-span" style="white-space: pre;"> </span>A frictionless heat engine can be 100% efficient only its exhaust temperature is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>equal to its input temperature</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>0°C</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>less than the input temperature</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>0 K</div> <div> <br /></div> <div> 6.<span class="Apple-tab-span" style="white-space: pre;"> </span>The resistance of conductor is R. The resistance of another conductor of identical material and equal length with twice the diameter is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>R/4</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>R/2</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>2R</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>4R</div> <div> <br /></div> <div> 7.<span class="Apple-tab-span" style="white-space: pre;"> </span>The magnitude of the magnetic field B at a point on the axis near the centre of the infinitely long solenoid having n turns per unit length and carrying a current I is given by...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>μ0nI</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>μ0I/n</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>(μ0nI)/4π</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>μ0I/4πn</div> <div> <br /></div> <div> 8.<span class="Apple-tab-span" style="white-space: pre;"> </span>The impedance of a circuit does not depend on...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>f</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>I</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>C</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>R</div> <div> <br /></div> <div> 9.<span class="Apple-tab-span" style="white-space: pre;"> </span>Shadows are never completely dark because of...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>interference</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>diffraction</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>polarization</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>reflection</div> <div> <br /></div> <div> 10.<span class="Apple-tab-span" style="white-space: pre;"> </span>Threshold frequency is the characteristic of...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>the incident radiation</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>the emitted electrons</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>the metal</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>both radiation and the metal</div> <div> <br /></div> <div> 11.<span class="Apple-tab-span" style="white-space: pre;"> </span>In the hydrogen spectrum,the seriesv obtained in the visible region is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>Balmer series</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>Lyman series</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Paschen series</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>Brackett series</div> <div> <br /></div> <div> 12.<span class="Apple-tab-span" style="white-space: pre;"> </span>Out of four different atoms:46A22, 48B22, 46C23, 44D20, the pair of isotones is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>A and B</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>B and C</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>A and C</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>A and D</div> <div> <br /></div> <div> 13.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a common-base circuit, the current gain is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>less than 1</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>greater than 1</div> <div> <br /></div> <div> 14.<span class="Apple-tab-span" style="white-space: pre;"> </span>The magnitude of the resultant of two forces is a minimum when the angle between them is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0°</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>45°</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>90°</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>180°</div> <div> <br /></div> <div> 15.<span class="Apple-tab-span" style="white-space: pre;"> </span>Work done on the particle in uniform circular motion is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>always positive</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>always negative</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>always zero</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>directly proportional to the force</div> <div> <br /></div> <div> 16.<span class="Apple-tab-span" style="white-space: pre;"> </span>An 800-kg car moving at 80 kmph collides head-on with a 1200-kg car moving at 40 kmph. If they stick together, the wreckage now has an initial speed of...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>8 kmph</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>40 kmph</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>56 kmph</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>60 kmph</div> <div> <br /></div> <div> 17.<span class="Apple-tab-span" style="white-space: pre;"> </span>Fluids possess...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>only volume elasticity</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>rigidity and volume elasticity</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>only rigidity</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>volume elasticity and tensile elasticity</div> <div> <br /></div> <div> 18.<span class="Apple-tab-span" style="white-space: pre;"> </span>A water-proofing agent...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>reduces angle of contact</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>increases angle of contact</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>decreases surface tension</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>increases surface area</div> <div> <br /></div> <div> 19.<span class="Apple-tab-span" style="white-space: pre;"> </span>A certain container holds 1 kg air at atmospheric pressure. When an additional 1 kg of air is pumped into the container at constant temperature, the pressure is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0.5 atm</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1 atm</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>2 atm</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>4 atm</div> <div> <br /></div> <div> 20.<span class="Apple-tab-span" style="white-space: pre;"> </span>If Q is the charge on either of the plates of the capacitor and V is the potential difference across the capacitor with capacitance C, what is not true is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>C = Q/V</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>V α Q</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>Q/V = constant</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>VQ = constant</div> <div> <br /></div> <div> 21.<span class="Apple-tab-span" style="white-space: pre;"> </span>The origin of all magnetic fields lies in...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>atoms of iron</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>magnetic domains</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>moving charges</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>permanent magnets</div> <div> <br /></div> <div> 22.<span class="Apple-tab-span" style="white-space: pre;"> </span>The effective atmosphere of sun is called...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>photosphere</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>chromosphere</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>corona</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>stratosphere</div> <div> <br /></div> <div> 23.<span class="Apple-tab-span" style="white-space: pre;"> </span>A 4 litre gas cylinder contains neon gas at 12 kPa. Another cylinder with 8 litre capacity is at same temperature and contains argon gas at 24 kPa. When the two are connected, the total pressure will be...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>16 kPa</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>18 kPa</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>20 kPa</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>36 kPa</div> <div> <br /></div> <div> 24.<span class="Apple-tab-span" style="white-space: pre;"> </span>Eddy currents can be of use in...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>dynamo armatures</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>moving coil galvanometers</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>transformer cores</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>all of the above.</div> <div> <br /></div> <div> 25.<span class="Apple-tab-span" style="white-space: pre;"> </span>A tube closed at one end and containing air, produces the fundamental note of frequency 512 Hz when excited. If the tube is open at both ends, the fundamental frequency that can be excited in Hz is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>1024</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>512</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>256</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>128</div> <div> <br /></div> <div> 26.<span class="Apple-tab-span" style="white-space: pre;"> </span>The process by which a heavy nucleus splits into two nuclei is known as...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>fusion</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>β-decay</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>fission</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>γ-emission</div> <div> <br /></div> <div> 27.<span class="Apple-tab-span" style="white-space: pre;"> </span>A uniform chain of length L and mass M is lying on a smooth table and one-third of its length is hanging vertically down over the edge of the table. If 'g' is the acceleration due to gravity, the work required to pull the hanging parton to the table is...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>MgL</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>MgL/3</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>MgL/9</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>MgL/8</div> <div> <br /></div> <div> 28.<span class="Apple-tab-span" style="white-space: pre;"> </span>Out of the following which is the most elastic ?</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>rubber</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>glass</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>steel</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>plastic</div> <div> <br /></div> <div> 29.<span class="Apple-tab-span" style="white-space: pre;"> </span>Amagat's isothermal graphs are in the form of...</div> <div> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>PV→T</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>PV→P</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>P→V</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>PV→V</div> <div> <br /></div> <div> 30.<span class="Apple-tab-span" style="white-space: pre;"> </span>An ideal heat engine absorbs heat at 127° and rejects heat at 77°. Efficiency of the engine is...</div> <div> A.  12.5%</div> <div> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>28%</div> <div> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>68%</div> <div> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>39%</div> <div> <br /> Hover your cursor/pointer on the dark area below to reveal answers.<br /> <br /></div> <div> <div class="postspoiler"> ANSWERS TO SET # 5<br /> <br /> (01) A (02) A (03) C (04) D (05) D<br /> (06) A (07) A (08) B (09) B (10) C<br /> (11) A (12) D (13) C (14) D (15) C<br /> (16) A (17) A (18) B (19) C (20) D<br /> (21) C (22) B (23) C (24) B (25) A<br /> (26) C (27) D (28) C (29) B (30) A</div> </div>

MCQs / Compilation of Physics Problems Part 5

MCQs / Compilation of Physics Problems PRACTICE TEST IN PHYSICS SET  5 1. T is the period of oscillation for a spring-mass system...

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MCQs / Compilation of Physics Problems Part 4

<h1 style="font-size: 20px; text-align: center;"> </h1> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs / Compilation of Physics Problems" border="0" src="http://3.bp.blogspot.com/-wyBevCtOAes/VQ_nDJDe90I/AAAAAAAABM0/Yqu3qycG6yo/s1600/mcqs-p6.jpg" title="MCQs / Compilation of Physics Problems" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;">MCQs / Compilation of Physics Problems</td></tr> </tbody></table> <b>PRACTICE TEST IN PHYSICS SET</b><b> 4</b><br /> <br /> 1.<span class="Apple-tab-span" style="white-space: pre;"> </span>When a rolling solid cylinder reaches the bottom of the slope, its linear velocity is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ gh<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ 2gh<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>mgh<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>√(4gh/3)<br /> <br /> 2.<span class="Apple-tab-span" style="white-space: pre;"> </span>For ideal gas, the graph of PV → P is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>a parabola<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>a hyperbola<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>inclined with P-axis<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>parallel to P-axis<br /> <br /> 3.<span class="Apple-tab-span" style="white-space: pre;"> </span>A spherical drop of mercury has a diameter of 6.0 x 10-3 m. If the surface tention of mercury is 0.5 N/m, then the pressure inside the drop will exceed the pressure outside by about...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>42 Pa<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>330 Pa<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>167 Pa<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>170 Pa<br /> <br /> 4.<span class="Apple-tab-span" style="white-space: pre;"> </span>A lift attendant has a mass of 70 kg. When the lift is going up with a constant acceleration of 1 m/s2, the force acting upwards on him is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>70 N<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>770 N<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>700 N<br /> <br /> 5.<span class="Apple-tab-span" style="white-space: pre;"> </span>A body is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>t1/2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>t3/4<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>t3/2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>t2<br /> <br /> 6.<span class="Apple-tab-span" style="white-space: pre;"> </span>The angular velocity of a body is changed from ω1 to ω2 by changing its moment of inertia. If no torque acts on the body then the ratio of initial radius of gyration to the final radius of gyration is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>ω1 : ω2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>ω2 : ω1<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ω1 : √ω2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ω2 : √ω1<br /> <br /> 7.<span class="Apple-tab-span" style="white-space: pre;"> </span>Two parallel plates carry opposite charges such that the electric field in the space betwen them is in upward direction. An electron is shot in the space and parallel to the plates. Its deflection from the original direction will be...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>downwards<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>upwards<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>circular<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>none<br /> <br /> 8.<span class="Apple-tab-span" style="white-space: pre;"> </span>Compton effect is associated to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>X-rays<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>β-rays<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>γ-rays<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>positive rays<br /> <br /> 9.<span class="Apple-tab-span" style="white-space: pre;"> </span>If the magnitude of gravitational force is 1, the relative magnitude of strong force is...<br /> A.  10-13<br /> B.  10-38<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>1038<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>1013<br /> <br /> 10.<span class="Apple-tab-span" style="white-space: pre;"> </span>In an elastic collision...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>momentum is conserved but not kinetic energy<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>kinetic energy is conserved but not momentum<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>both momentum and kinetic energy are conserved<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>neither omentum nor kinetic energy is conserved<br /> <br /> 11.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a crystal the angles between the edges of the faces and between the faces themselves are...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>right angles<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>acute angles<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>obtuse angles<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>constant<br /> <br /> 12.<span class="Apple-tab-span" style="white-space: pre;"> </span>The equation of continuity indicates that the velocity of the fluid is greater at<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>narrow cross-section<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>broad cross-section<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>entry point<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>exit point<br /> <br /> 13.<span class="Apple-tab-span" style="white-space: pre;"> </span>The internal energy of an ideal gas is dependent on...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>its temperature only<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>its temperature and volume<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>its temperature and pressure<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>its temperature, pressure and volume<br /> <br /> 14.<span class="Apple-tab-span" style="white-space: pre;"> </span>The field at any point on the surface of the conductor is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>zero<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>parallel to the surface<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>perpendicular to the surface<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>neither parallel nor perpendicular to the surface<br /> <br /> 15.<span class="Apple-tab-span" style="white-space: pre;"> </span>A magnetic iron bar is strongly heated. Its magnetic field...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>becomes stronger<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>becomes weaker<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>reverses its direction<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>does not change<br /> <br /> 16.<span class="Apple-tab-span" style="white-space: pre;"> </span>The angle subtended by the secondary bow at the eye is about...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>41°<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>47°<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>53°<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>60°<br /> <br /> 17.<span class="Apple-tab-span" style="white-space: pre;"> </span>If M and L are respectively the mass and luminosity of a star, then L = Mα, where...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>0<α<1<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>α<0<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>1<α<2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>2<α<4<br /> <br /> 18.<span class="Apple-tab-span" style="white-space: pre;"> </span>'T' is period of oscillation of an object performing SHM. Its potential energy is zero at some instant. The time taken to attain maximum potential energy is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>T<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>T/2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>T/4<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>T/8<br /> <br /> 19.<span class="Apple-tab-span" style="white-space: pre;"> </span>A sonar signal sent vertically downwards from a ship is reflected from the ocean floor and detected by a microphone on the keel 0.4 s after transmissiom. If speed of sound in water is 1500 m/s, the depth of the ocean in metre is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>150<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>300<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>600<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>7500<br /> <br /> 20.<span class="Apple-tab-span" style="white-space: pre;"> </span>A car of mass M is turning a corner of radius r. The coefficient of friction between the wheels and the horizontal road surface is μ. The maximum speed with which the car can turn the corner without skidding is given by...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>Mrg<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>√Mrg<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ μrg<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>(μrM)/g<br /> <br /> 21.<span class="Apple-tab-span" style="white-space: pre;"> </span>The altitude of geostationary satellite above the earth's surface is approximately...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>35900 km<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>42300 km<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>11.2 km<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>24040 km<br /> <br /> 22.<span class="Apple-tab-span" style="white-space: pre;"> </span>In order to emit electromagnetic radiation, an object must be at a temperature...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>above 0 K<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>above 0°C<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>above that of its surroundings<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>high enough for it to glow<br /> <br /> 23.<span class="Apple-tab-span" style="white-space: pre;"> </span>A 200 m long copper wire has a resistance of 2 ohm. Its cross-sectional area is ... (take ρ = 1.7 x 10-8 ohm-meter)<br /> A.  0.0017 mm2<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1.7 mm2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>3.4 mm2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>5.3 mm2<br /> <br /> 24.<span class="Apple-tab-span" style="white-space: pre;"> </span>The unit of conductivity is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>ohm-meter<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>ohm/meter<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>mho-meter<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>mho/meter<br /> <br /> 25.<span class="Apple-tab-span" style="white-space: pre;"> </span>When the lead-storage cell is completely discharged, the specific gravity of the electrolyte becomes<br /> A.  1.285<br /> B.  1.825<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>1.5<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>1.15<br /> <br /> 26.<span class="Apple-tab-span" style="white-space: pre;"> </span>Two solenoids A and B have equal number of turns. The length of A is twice that of B and the cross-sectional area of A is half that of B. Other things being similar, the ratio of their inductances LA/LB is equal to...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>1<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>4<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>1/4<br /> <br /> 27.<span class="Apple-tab-span" style="white-space: pre;"> </span>In a resistive circuit, the power factor is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>π<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>1<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>√ 2<br /> D.  √(1/2)<br /> <br /> 28.<span class="Apple-tab-span" style="white-space: pre;"> </span>The impedance of a parallel RLC circuit at resonance is...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>less than R<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>more than R<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>equal to R<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>any of the above<br /> <br /> 29.<span class="Apple-tab-span" style="white-space: pre;"> </span>Longitudinal waves do not exhibit...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>refraction<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>reflection<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>diffraction<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>polarization<br /> <br /> 30.<span class="Apple-tab-span" style="white-space: pre;"> </span>If E1 is the energy of a photon of ultraviolet light and E2 that of a photon of red light, then...<br /> A.<span class="Apple-tab-span" style="white-space: pre;"> </span>E1/E2 = 1<br /> B.<span class="Apple-tab-span" style="white-space: pre;"> </span>E1 < E2<br /> C.<span class="Apple-tab-span" style="white-space: pre;"> </span>E1 > E2<br /> D.<span class="Apple-tab-span" style="white-space: pre;"> </span>E1 - E2 = 0<br /> <br /> <div class="postspoiler"> ANSWERS TO SET # 4<br /> <br /> (01) D (02) D (03) B (04) C (05) C<br /> (06) D (07) A (08) A (09) C (10) A<br /> (11) D (12) A (13) A (14) C (15) B<br /> (16) C (17) D (18) C (19) B (20) C<br /> (21) A (22) A (23) C (24) D (25) D<br /> (26) A (27) B (28) C (29) D (30) C </div>

MCQs / Compilation of Physics Problems Part 4

MCQs / Compilation of Physics Problems PRACTICE TEST IN PHYSICS SET  4 1. When a rolling solid cylinder reaches the bottom of the s...

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