Uttarakhand Lab Assistant (Physics) Post Code – 047 Exam Paper 2016

61. The time in which a force of 2 N produces a change in momentum of 0.4 kg-ms^-1 in the body is–
(A) 0.2 s
(B) 2 s
(C) .002 s
(D) None of these

62. Swimming is possible on account of
(A) First law of motion
(B) Second law of motion
(C) Third law of motion
(D) None of these

63. A body, whose momentum is constant, must have constanta –
(A) Force
(B) Acceleration
(C) Both A & B
(D) Velocity

64. The motion of a rocket is based on the Principle of conservation of
(A) Mass
(B) Linear momentum
(C) Kinetic energy
(D) None of these

65. Which one of the following is not used to reduce Friction
(A) Oil
(B) Sand
(C) Ball bearing
(D) None of these

66. Which of the following is a scalar quantity
(A) Displacement
(B) Electric field
(C) Acceleration
(D) Work

67. Which of following is a unit of energy
(A) Unit
(B) Watt-Newton/sec³
(C) Newton
(D) None of these

68. If the K.E. of a body is increased by 300% its momentum will increase by
(A) 100%
(B) 300%
(C) √300%
(D) None of these

69. A light and a heavy body have equal kinetic energy which one has a greater momentum—
(A) The light body
(B) The heavy body
(C) Both have equal momentum
(D) None of these

70. If the K.E. of a particle is doubled, then its momentum will
(A) Remain unchanged
(B) Be doubled
(C) Increase √2 times
(D) None of these

71. Which among the following is a form of energy
(A) Light
(B) Displacement
(C) A & B Both
(D) None of these

72. If a force F is applied on a body and it moves with a velocity v, the power will be
(A) F × V
(B) F/V
(C) F/V²
(D) F × V²

73. The angular velocity of a wheel increases from 100 rs to 300 rupees in 10 seconds. The number of revolution made during that time is—
(A) 600
(B) 1500
(C) 2000
(D) None of these

74. Analogue of mass in rotational motion is –
(A) Angular momentum
(B) Moment of Inertia
(C) Torque
(D) None of these

75. Moment of Inertia along the diameter of a ring is—-
(A) ½ MR²
(B) ⅗ R/M²
(C) MR^3/7
(D) None of these

76. If the external torque acting on a system T = 0, then—
(A) W = ()
(B) a = 0
(C) J = 0
(D) None of these

77. The motion of planets in the solar system is an example of—
(A) Mass conservation
(B) Linear momentum conservation
(C) Angular momentum conservation
(D) Energy Conservation

78. The total kinetic energy of rolling solid sphere having translational velocity v is–
(A) ½ mv²
(B) 5/11 mv²
(c) 7/9 mv²
(D) None of these

79. The force of gravitation is–
(A) Repulsive
(B) Electrostatic
(C) Conservative
(D) Non Conservative

80. The time period of a simple pendulum on a freely moving artificial satellite is—
(A) Zero
(B) 2 sec
(C) 3 sec
(D) Infinite

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