| Coverage : The GEd Practice Test - Science - Physics has been designed to test the concepts of the test taker in one of the main branches of science, namely Physics. This test covers topics like, mechanics and thermodynamics, energy transfer, electricity and magnetism, nuclear physics etc. |
| 1. | Which of the following force(s) is (are) regarded as the fundamental force(s) in physics? |
| a. | | Length |
| b. | | Mass |
| c. | | Time |
| d. | | Force
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| 2. | Which one of the following quantities corresponds to the rate of change of linear momentum? |
| a. | | Force |
| b. | | Work |
| c. | | Power |
| d. | | Kinetic energy
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| 3. | The speed (v) of a body varies with time (t) as v=atē+bt+c, where a, b and c are positive constants of motion. This relation suggests that the body has: |
| a. | | A constant acceleration |
| b. | | A constant retardation |
| c. | | A variable acceleration |
| d. | | A variable retardation
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| 4. | Which one of the following quantities corresponds to the rate of change of linear momentum? |
| a. | | Force |
| b. | | Work |
| c. | | Power |
| d. | | Kinetic energy
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| 5. | A bus and a car are moving on a straight road with the same kinetic energy. They are brought to rest by the application of brakes which provides equal retarding force. Which one of them will come to rest in a shorter distance? |
| a. | | The bus |
| b. | | The car |
| c. | | Both will travel the same distance before coming to the rest |
| d. | | The distance will depend upon the horse power of the vehicle
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| 6. | If the linear momentum of a body is increased by 20%, the percentage increase in the kinetic energy will be: |
| a. | | 36% |
| b. | | 44% |
| c. | | 52% |
| d. | | 60%
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| 7. | If the kinetic energy of a body is decreased by 36%, the percentage decrease in the linear momentum will be: |
| a. | | 12% |
| b. | | 20% |
| c. | | 28% |
| d. | | 36%
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| 8. | Two bodies of masses 1kg and 4kg have equal linear momenta. The ratio of their kinetic energies is: |
| a. | | 1.41 |
| b. | | 2 |
| c. | | 4 |
| d. | | 16
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| 9. | Two bodies of masses 1kg and 4kg have equal kinetic energies. The ratio of their linear momenta is: |
| a. | | 1/2 |
| b. | | 1/4 |
| c. | | 1/8 |
| d. | | 1/16
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This question is based upon the figure shown below
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| 10. | Two skaters A and B with masses 50 kg and 70 kg respectively, stand 6 meters apart facing each other on a horizontal smooth surface. They pull on a rope stretched between them. How far does each skater move when they meet? |
| a. | | Both A and B move 3 meters |
| b. | | A moves 4 meters and B 2 meters |
| c. | | A moves 2.5 meters and B 3.5 meters |
| d. | | A moves 3.5 meters and B 2.5 meters
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| 11. | Choose the only correct statement from the following: |
| a. | | A body is having a variable speed can have a constant velocity |
| b. | | A body having a constant speed can have a variable acceleration |
| c. | | A body having a constant speed cannot have any acceleration |
| d. | | A body having a constant speed can have varying velocity
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| 12. | A person is sitting facing the engine in a moving train. He tosses a coin. The coin falls behind him. This shows that the train is: |
| a. | | Moving forward with a finite acceleration |
| b. | | Moving forward with a finite retardation |
| c. | | Moving forward with a uniform speed |
| d. | | Moving backward with a uniform speed
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| 13. | The density of sea water increases as the: |
| a. | | Depth and salinity increases |
| b. | | Depth and salinity decrease |
| c. | | Depth increases and salinity decreases |
| d. | | Depth decreases and salinity increases
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| 14. | A body moving at a speed v has kinetic energy equal to K. If the speed of the body becomes 2v, what will be its kinetic energy? |
| a. | | K/4 |
| b. | | K/2 |
| c. | | 2K |
| d. | | 4K
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| 15. | When a spring is stretched by an amount x, the potential energy stored in it is V. If the same spring is stretched by an amount of 2x, its potential energy will be: |
| a. | | 4V |
| b. | | 2V |
| c. | | V/2 |
| d. | | V/4
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| 16. | When a ship enters a sea from river, it rises a little because: |
| a. | | Density of sea water is less than that of river water |
| b. | | Sea is deeper than river |
| c. | | Sea has more water than river |
| d. | | Sea water being denser than river water, exerts a greater upthrust on the ship
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| 17. | A simple pendulum oscillates between two extreme positions about the equilibrium position. There is a position exactly halfway between equilibrium position and one of the extreme positions. Which one of the following statements is not true? The energy of the pendulum will be: |
| a. | | Entirely potential at extreme position |
| b. | | Entirely kinetic at equilibrium position |
| c. | | Entirely kinetic at extreme position |
| d. | | Half kinetic and half potential at mid position
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| 18. | A simple pendulum has frequency of oscillation equal to f. It is therefore taken to a certain height above the ground and then dropped along with its support so that it falls freely under gravity. The frequency of the falling pendulum will:
a)Remain equal to f |
| b. | | Become greater than f |
| c. | | Become less than f |
| d. | | Zero
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| 19. | A person measures the time period of a simple pendulum inside a stationary lift and find it to be T. If the lift starts accelerating upward, the time period of the pendulum will: |
| a. | | Remain equal to T |
| b. | | Become greater than T |
| c. | | Become less than T |
| d. | | Become zero
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| 20. | If the length of a simple pendulum is increased by 44%, its time period will increase by: |
| a. | | 10% |
| b. | | 20% |
| c. | | 44% |
| d. | | 40%
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| 21. | A hollow metallic sphere filled with water is hung from a support by a long thread. A small hole is made at the bottom of the sphere and it is oscillated. Choose the only correct statement from the following: |
| a. | | The time period will remain unchanged as the water is flowing out |
| b. | | The time period will keep increasing until the sphere is empty |
| c. | | The time period will keep decreasing until the sphere is empty |
| d. | | The time period will increase at first, then decrease until the sphere is empty. Finally the time period will be the same as when the sphere was full of water
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| 22. | A simple pendulum has a time period T. If it is taken to the moon (where the acceleration due to gravity is one tenth that on the earth), its time period will: |
| a. | | Remain equal to T |
| b. | | Become 6T |
| c. | | Become 2.44T |
| d. | | Become T/2.44
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| 23. | A heavy metal sphere is suspended from a spring. When pulled down a little and released, it oscillates up and down with time period T. If it is taken to the moon (where acceleration due to gravity is one-sixth that on earth), the time period of vertical oscillation will: |
| a. | | Remain equal to T |
| b. | | Become 6T |
| c. | | Become 2.44T |
| d. | | Become T/2.44
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| 24. | A block of wood is floating in a lake. The apparent weight of the floating block is: |
| a. | | Zero |
| b. | | Equal to its true weight |
| c. | | More than its true weight |
| d. | | Less than its true weight
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| 25. | A boat carrying a number of large stones is floating in a water tank. If the stones are unloaded into the water, the level of water in the tank: |
| a. | | Will remain unchanged |
| b. | | Will rise |
| c. | | Will fall |
| d. | | Will rise till half number of stones are unloaded and then will begin to fall
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| 26. | Which instrument is used to measure the relative density of a liquid? |
| a. | | Altimeter |
| b. | | Hydrometer |
| c. | | Barometer |
| d. | | Galvanometer
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| 27. | Which instrument is used to measure Atmospheric pressure? |
| a. | | Manometer |
| b. | | Hydrometer |
| c. | | Altimeter |
| d. | | Barometer
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| 28. | A mercury barometer is enclosed in a tall glass cylinder. If the air is slowly removed from the enclosure by means of a vacuum pump, the level of the mercury in the barometer tube will |
| a. | | Steadily fall |
| b. | | Steadily rise |
| c. | | Remain unchanged |
| d. | | Suddenly fall to zero
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| 29. | A hydrogen filled balloon stops rising after it has attained a certain height. This happens because |
| a. | | The atmospheric pressure decreases with height and becomes zero when maximum height is attained |
| b. | | The acceleration due to gravity decreases with height and becomes zero when maximum height is attained |
| c. | | The temperature of air decreases with height and becomes equal to that of hydrogen in the balloon when maximum height is attained |
| d. | | At the highest point, the density of air is such that the buoyant force on the balloon equals its weight
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| 30. | A steel ball floats on mercury because |
| a. | | The density of mercury is greater than that of the steel |
| b. | | The density of mercury is less than that of steel |
| c. | | Mercury is a metal in the liquid form |
| d. | | Any metallic ball can be made to float in any liquid by suitable adjustment
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| 31. | The atmospheric pressure on earth is due to |
| a. | | The gravitational exerted on earth by the moon |
| b. | | The gravitational force exerted on earth by the sun |
| c. | | The weight of all the air in the earth's atmosphere |
| d. | | The weight of the ionized gases in the ionosphere
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| 32. | The metallic strip in a thermostat consists of brass and iron. When the strip is heated, it bends into an arc with brass on the convex side and iron on the concave side of the arc. This happens because |
| a. | | Brass has a higher specific heat capacity than iron |
| b. | | The density of brass is more than that of iron |
| c. | | It is easier to bend a brass strip than an iron strip of the same size |
| d. | | Brass has a higher coefficient of linear expansion than iron
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| 33. | When a solid metallic sphere is heated, the largest percentage increase occurs in its |
| a. | | Diameter |
| b. | | Surface area |
| c. | | Volume |
| d. | | Density |
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This question is based upon the figure shown below
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| 34. | The above figure shows the volume-temperature (V-T) graph for a certain mass of a gas at two constant pressure P1 and P2. Which of the following inferences is correct? |
| a. | | P1=P2 |
| b. | | P1>P2 |
| c. | | P1| d. | | No inference can be drawn due to insufficient information
| | | This question is based upon the figure shown below
| | 35. | The figure shows the pressure volume (P-V) graph for a certain mass of a gas at two constant temperatures T1 and T2. Which one of the following inference is correct? | | a. | | T1=T2 | | b. | | T1>T2 | | c. | | T1| d. | | No inference can be drawn due to insufficient information
| | | This question is based upon the figure shown below
| | 36. | From a source, heat is supplied at a constant rate to a solid cube. The variation of temperature of the cube with the heat supplied is shown in the above figure. The portion DE of the graphs represents conversion of: | | a. | | Solid into liquid | | b. | | Liquid into vapor | | c. | | Solid into vapor | | d. | | Vapor into solid
| | | This question is based upon the figure shown below
| | 37. | The reciprocal slope of the line EF in the above figure represents: | | a. | | Latent heat of fusion | | b. | | Latent heat of vaporisation | | c. | | Thermal capacity of liquid | | d. | | Thermal capacity of the vapor
| | | This question is based upon the figure shown below
| | 38. | In above figure, it is observed that DE=3BC. This means that: | | a. | | The thermal capacity of the vapor is 3 times that of the liquid | | b. | | The specific heat of the vapor is 3 times that of the liquid | | c. | | The latent heat of vaporization of the liquid is 3 times the latent heat of fusion of the solid | | d. | | The latent heat of fusion of the solid is 3 times the latent heat of vaporization of the liquid
| | | This question is based upon the figure shown below
| | 39. | How will the image formed by a convex lens be affected if the upper half of the lens is wrapped in a black paper as shown in figure? | | a. | | The size of the image is reduced to half | | b. | | The upper half of the image will be absent | | c. | | Full image is obtained but its brightness is reduced | | d. | | There will be no effect on the image
| | | This question is based upon the figure shown below
| | 40. | How will the image formed by a convex lens be affected if the central portion of the lens is wrapped in black paper as shown in figure? | | a. | | Two images will be formed instead of one | | b. | | The central portion of the image will be absent | | c. | | No image is formed by remaining portion of the lens | | d. | | A full image will be formed but it will be less bright
| | | This question is based upon the figure shown below
| | 41. | Figure shows an equi-convex lens of focal length f. What will be the focal length of each half if the lens is cut along AB? | | a. | | f/2 | | b. | | f | | c. | | 3f/2 | | d. | | 2f
| | | This question is based upon the figure shown below
| | 42. | The lens shown in the figure is broken into two equal halves by cutting along CD. What is the focal length of each half? | | a. | | f/2 | | b. | | f | | c. | | 3f/2 | | d. | | 2f
| | | | 43. | Which of the following optical devices should be used to obtain a parallel beam of light from a tiny source of light? | | a. | | Convex mirror | | b. | | Concave mirror | | c. | | Plane mirror | | d. | | Concave lens
| | | This question is based upon the figure shown below
| | 44. | A lamp is fixed at the ceiling of a circular tunnel as shown in figure. What is the ratio of the intensities of light at base A and a point B on wall? | | a. | | 1:2 | | b. | | 1:1.41 | | c. | | 1:1.73 | | d. | | 2:3
| | | | 45. | Which of the following phenomenon cannot be explained on the basis of the wave theory of light? | | a. | | Reflection | | b. | | Refraction | | c. | | Diffraction | | d. | | Photoelectric effect
| | | | 46. | An air bubble in water will act as a: | | a. | | Convex mirror | | b. | | Convex lens | | c. | | Concave mirror | | d. | | Concave lens
| | | | 47. | What happens when a capacitor is connected to a battery? | | a. | | No current flows in the circuit at all | | b. | | A current flows in the circuit for sometime and then decreases to zero | | c. | | The current in the circuit keeps on increasing, reaching a maximum value when the capacitor is charged to the voltage of the battery | | d. | | An alternating current flows in the circuit
| | | | 48. | What happens when an alternating voltage is applied to a capacitor? | | a. | | A direct current flows in the circuit for a short time and then becomes zero | | b. | | An alternating current flows in the circuit for a short time and then becomes zero | | c. | | No current flows in the circuit | | d. | | An alternating current flows in the circuit
| | | | 49. | Transformers are used in: | | a. | | Dc circuits alone | | b. | | Ac circuit alone | | c. | | Both ac and dc circuit | | d. | | Integrated circuits
| | | | 50. | A fuse should be made of material having: | | a. | | A high melting point and a high resistance | | b. | | A low melting point and a high resistance | | c. | | A high melting point and a low resistance | | d. | | A low melting point
| | | | 51. | Mach number is used in connection with the speed of: | | a. | | Sound | | b. | | Aircraft | | c. | | Spacecraft | | d. | | Ships
| | | | 52. | Choose the only wrong statement from the following: | | a. | | Sound wave travels faster in water than in air | | b. | | Light wave travels faster in air than in water | | c. | | Light can travel in vacuum but sound cannot | | d. | | Light and sound waves are both electromagnetic waves
| | | | 53. | Which of the following electromagnetic waves has the lowest frequency: | | a. | | X-rays | | b. | | Visible light | | c. | | Microwaves | | d. | | Radiowaves
| | | | 54. | Which of the following electromagnetic wave has the lowest frequency: | | a. | | Ultraviolet | | b. | | Visible light | | c. | | Infrared | | d. | | Microwaves
| | | | 55. | Which of the following parameters determines the pitch of the sound? | | a. | | Frequency | | b. | | Mplirude | | c. | | Speed | | d. | | Intensity
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