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Physics – General – LS

Physics – Set 8

Dear ! This is Physics – Set 8  Quiz and it contains 100 questions.

Happy Learning!

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1. In a water lifting electric pump, we convert

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2. A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments

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3. For which one of the following does the centre of mass lie outside the body?

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4. A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ?

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5. The work done by the string of a simple pendulum during one complete oscillation is equal to

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6. The dimension of which of the following is the same as that of impulse ?

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7. Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?

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8. In case of uniform circular motion, the acceleration is

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9. A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

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10. Angle of friction and angle of repose are

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11. The force that keeps a body in a circular motion called

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12. A cyclist leans inwards when he is negotiating a curve so that

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13. Solar energy is converted into chemical energy during

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14. Small bubbles are perfectly spherical because of

 

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15. The SI unit for measuring work and energy is

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16. The dimension of which of the following is the same as that of impulse ?

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17. An object covers distance which is directly proportional to the square of the time. Its accelaration is

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18. Force of impact is the force

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19. A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

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20. The motion of a body around a circular path is an example of

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21. The law of conservation of energy states that

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22. The energy stored in a watch spring is

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23. In a rechargeable cell what kind of energy is stored within the cell?

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24. For a freely falling body, the sum of kinetic energy and potential energy is always

 

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25. When an unbalanced force acts on an object

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26. A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is

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27. A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

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28. Work done in a free expansion process is

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29. The device used to convert solar energy into electricity is

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30. An object that has kinetic energy must be

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31. What should a person on a freely rotating turn table do to decrease his (angular) speed ?

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32. In which of the following cases, kinetic energy is being used in performing work ?

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33. A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

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34. A person lifts luggage of 20 kg from the ground and puts it on his head 2m above the ground. Calculate the work done by him. (g = 10 )

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35. A dynamo is a device which

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36. The device which converts sound energy into electrical energy is called

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37. The minimum number of forces to keep a particle in equilibrium is

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38. In hydro power station, the motion produced in turbines is due to

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39. A particle is thrown vertically upward. When it reaches the highest point, it has

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40. What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?

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41. The working of a rocket is based on the principle of:

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42. Which one of the following is applicable to collision-coalescence process of precipitation?

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43. A sphere rolls down on two inclined planes of different angles but same height, it does so

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44. Conversion of sound energy into electrical energy is done by

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45. Dynamo is a device for converting

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46. An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is

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47. A body moving in a circular path with a constant speed has a

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48. If lift is going up with acceleration, the apparent weight of a body is

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49. If an electron and a photon have the same wavelength, then they will have the same

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50. Rain drops fall from great height. Which among the following statements is true regarding it?

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51. The term ”Higgs Boson’ is associated with

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52. Gasoline is useful in cars because it has

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53. Centrifugal force increases with

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54. A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle

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55. Electric Motor converts ________ energy to mechanical energy

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56. A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________

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57. An object covers distance which is directly proportional to the square of the time. Its accelaration is

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58. What is the SI unit of Power?

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59. A person does some work of 1,000 J in 2 s. His power will be ________

 

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60. Velocitation is the tendency to

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61. Fat can be seperated from milk in a cream seperator because of :

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62. If the velocity of a body is halved its kinetic energy ________

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63. Which of the following is not a property of heavy water ? 

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64. If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with

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65. The dimension MLT–2 corresponds to

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66. When milk is churned, the cream separates from it due to:

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67. The force that generates wind is

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68. When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

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69. Necessary element of change in solar energy to electrical energy

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70. Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?

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71. The quantity that is not conserved in an inelastic collision is

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72. If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by

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73. A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

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74. A voltaic cell converts chemical energy to

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75. The angle in which a cricket ball should be hit to travel maximum horizontal distance is :

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76. When the milk is churned vigorously the cream from it is separated out due to

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77. If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is

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78. A dynamo is used to convert

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79. What device converts light energy to electrical energy?

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80. The point where total mass of a body is supposed to be concentrated is known as

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81. A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle ?

 

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82. A photo-electric cell converts

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83. Kinetic energy depends on

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84. What is the direction of torque?

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85. If an object is thrown upwards, what will be its velocity, when it reaches its maximum height?

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86. A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

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87. A rubber ball is dropped from a height of 2 metres. To what height will it rise if there is no loss of energy/velocity after rebounding ?

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88. A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan

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89. A bullet of mass 10gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun.

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90. A bullet of mass 10gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun.

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91. It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because

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92. 1 Joule is Equal to

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93. Which of the following liquids is most viscous?

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94. Damp clothes are dried in spin dryers by the action of

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95. Which results in an increase in power?

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96. What type of force acts on a car moving around a curve?

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97. When all the forces and torques are balanced in a mechanical body it is said to be in

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98. A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

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99. A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

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100. In a photocell light energy is converted into

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