3. If the gradient of a graph is negative, then the acceleration is
Correct : B. negative
4. If a student drops a stone from a cliff of height 30 m and the time it takes to reach the ground is 2.6 s, then the acceleration due to gravity is
Correct : D. $$$8.8ms^{-2}$$$
5. Gradient of line of velocity-time graph is tells us the
Correct : B. acceleration
6. A stone is thrown upwards with initial velocity of $$$20ms^{-1}$$$, the height that stone will reach would be
Correct : A. 20 m
7. Projectile will attain its maximum range, if it is fired at an angle of
Correct : D. 45°
8. Horizontal component of a bouncing ball is
Correct : B. unaffected by gravity
9. When ball having a projectile motion is rising up, it
Correct : A. decelerates
10. Equation of motion can be used for
Correct : A. straight line motion only
11. Acceleration of free fall depends on the
Correct : B. weight of object
12. If initial velocity of an object is zero, then distance covered by it in time t and acceleration of $$$9.8ms^{-2}$$$ would be
Correct : D. $$$4.9\:t^{2}$$$
13. As the ball falls towards the ground, its velocity
Correct : A. increases
14. Gradient of velocity-time graph tells us about object's
Correct : D. acceleration
15. An object whose velocity is changing is said to be in a state of
Correct : A. acceleration
16. Acceleration of train when it is moving steadily from $$$4.0\:ms^{-1}$$$ to $$$20\:ms^{-1}$$$ in 100s is
Correct : C. $$$0.16\:ms^{-2}$$$
17. If we get a straight line with positive slope then its acceleration is
Correct : D. constant
18. If a spinster staring from rest has acceleration of $$$5ms^{-2}$$$ during 1st 2.0s of race then her velocity after 2 s is
Correct : B. $$$10ms^{-1}$$$
19. Horizontal distance traveled by a ball if it's thrown with initial velocity of $$$20ms^{-1}$$$ at an angle of 30° is
Correct : C. 35.3 m
20. If a car starting from rest reaches a velocity of $$$18ms^{-1}$$$ after 6.0 s then its acceleration is
Correct : C. $$$3ms^{-2}$$$
21. A train travelling at $$$20m s^{-1}$$$ accelerates at $$$ 0.5ms^{-2}$$$ for 30 s, the distance travelled by train is
Correct : A. 825 m
22. Area under velocity-time graph tells us the
Correct : C. displacement
23. If a secondary coil has 40 turns, and, a primary coil with 20 turns is charged with 50 V of potential difference, then the potential difference in the secondary coil would be
Correct : D. 100 V in secondary coil
24. Generators at a power station produce electric power at voltage
Correct : D. 25 kW
25. Equation which measures alternating voltage is
Correct : C. Vo sinωt
26. In transformer, alternating current is induced in
Correct : B. secondary coil
27. High voltages lead to
Correct : A. less power loss
28. Graph of alternating current is a
Correct : D. sine wave
29. A component that allows only unidirectional current to pass through it is
Correct : D. diode
30. Average power dissipated in resistor if sinusoidal p.d of peak value 25V is connected across a 20 Ω resistor is
Correct : A. 15.6 W
31. Amount of d.c voltage as compare to Vo is
Correct : C. 70%
32. A well designed transformer loses power under
Correct : C. 0.1%
33. Ratio of voltages is equal to ratio of
Correct : C. number of turns in coil
34. Process in which A.C is converted into D.C is called
Correct : B. rectification
35. Steady d.c voltage is also known as
Correct : B. root mean square velocity
36. Ratio of voltages is inverse ratio of the
Correct : D. current
37. If output voltage is greater than input voltage, then transformer is
Correct : A. step up
38. Highest point on AC graph is known as
Correct : A. peak value
39. There are three equations of uniformly accelerated motion, the odd one
out is
42. In order to keep a body moving in a circle, there exists a force on it that
is directed toward the center of the circle. This force is known as
Correct : B. Centripetal force
43. A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If the atmospheric pressure is assumed to be 100 kPa and thickness of the tank walls is assumed to be negligible, the force exerted by the atmosphere on the surface of water is
Correct : D. 200 kN
44. If we have a positive and a negative charge, then force between them is
Correct : B. negative
45. Electrical force exerted by two point charges on each other is inversely proportional to
Correct : D. square of distance between them
46. Unit for pressure used in weather maps is millibar. 1 millibar is equal to
Correct : C. 100 Pa
47. Speed of stationary waves is
Correct : D. zero
48. If charge is placed at infinity, it's potential is
Correct : A. zero
49. Most appropriate instrument for measurement of internal and external
diameter of a tube is
Correct : A. vernier callipers
50. When distance from center is doubled then electric field strength will
Correct : A. decrease by the factor of four
51. Liquid A and liquid B exert same amount of pressure on each other, but the density of A is twice the density of B. The height of liquid B is 10 cm, then the height of liquid A would be
Correct : A. 5 cm
52. Incorrect statement for co-efficient of friction could be that
Correct : C. The coefficient of friction is constant even in the conditions of fast slipping and high contact pressure
53. If we move a positive charge to a positive plate, then potential energy
of charge is
Correct : B. increased
54. An instrument commonly used for the measurement of atmospheric
pressure is known as
Correct : B. Barometer
55. Phase difference between a node and an antinode is
Correct : C. 180°
56. Our weight, as measured by the spring weighing machine is equivalent of
Correct : D. The total gravitational force that Earth exerts on us - The total centripetal force required to keep us moving on Earth's axis
57. Point where spring oscillates with maximum amplitude is called
Correct : B. antinode
58. According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is
Correct : D. Directly proportional to the product of their masses and inversely proportional to the square of their distance apart
59. Correct example of vector quantities could be
Correct : B. Displacement and Velocity
60. In a stationary wave, nodes are at
Correct : A. fixed points
61. In the formation of stationary waves, at T⁄2 the waves are
Correct : B. in phase
62. A vector quantity is one which has
Correct : A. direction as well as magnitude
63. Centripetal force is dependent on three factors, the odd one out of these factors is
Correct : C. Volume of the rotating object
64. Graph of potential energy against distance is
Correct : D. straight line
65. On all instruments like measuring cylinder, pipette and burette, readings are always taken at the bottom of the meniscus of liquid. This is not true for liquids like
Correct : C. Mercury
66. In a weather map, lines joining all those regions with same
atmospheric pressure are called
Correct : C. Isobars
67. For a given system, the minimum frequency of a standing wave is in a
Correct : A. fundamental mode
68. In an electric field, energy per unit positive charge is
Correct : A. voltage
69. In Kundt's dust tube, dust accumulates at
Correct : A. nodes
70. A node having twice the frequency of the fundamental is called
Correct : B. harmonic
71. If frequency of certain wave is f, then it's velocity is {{}}
Correct : A. v = fλ
72. Origin of gravitational field is
Correct : B. masses
73. At separation between a node and antinode, wavelength becomes
Correct : C. λ⁄4
74. If the plates of capacitor are oppositely charged then the total charge is
equal to
Correct : C. zero
75. Area under current-time graph represents
Correct : A. magnitude of charge
76. If charge stored on plates of capacitor is large, then capacitance will be
Correct : B. large
77. insulator which is placed between 2 plates of capacitor is
Correct : B. dielectric
78. Combined capacitance is equal to the
Correct : A. sum of all capacitance of capacitors
79. capacitance and charge on plates are
Correct : B. directly related
80. If the capacitors are connected in parallel, then the potential difference across each capacitor is
Correct : A. same
81. Total capacitance of 300 mF capacitor and a 600 mF in series is
Correct : C. 200 mF
82. Work done in charging a capacitor is given by
Correct : A. (1⁄2)QV
83. Device used to store energy in electrical circuits is
Correct : C. capacitor
84. Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V is
Correct : C. 0.10 J
85. Capacitor is fully charged if potential difference is equal to
Correct : A. e.m.f
86. An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of $$$8*10^{6} \: ms ^{-1}$$$ , the radius of the circular path followed by an electron is
Correct : A. 3.8 cm
87. Hall voltage is directly proportional to
Correct : C. magnetic flux density
88. Force due to magnetic field and velocity is
Correct : A. at right angles to each other
89. Force on a moving charge in a uniform magnetic field depends upon
Correct : D. all of above
90. Electric field strength related to hall voltage is given by
Correct : B. VH⁄d
91. Hall probe is made up of
Correct : C. semiconductor
92. For an electron, magnitude of force on it is
Correct : A. BeV
93. When current is parallel to magnetic fields, force on conductor is
Correct : A. zero
94. Direction of conventional current is
Correct : C. direction of flow of positive charge
95. According to the equation ‘r =(mv)⁄(Be)’, the faster moving particles
Correct : C. move in bigger circle
96. In Hall effect, voltage across probe is known as
Correct : A. hall voltage
97. Angle through which an object has moved is called it's
Correct : C. angular displacement
98. Angular velocity of second hand of clock is 0.105 rad s-1 and length of hand is 1.8 cm, then speed of tip of hand is {{}}
Correct : A. 0.189 cm s-1
99. Object moving along a circular path is
Correct : B. not in equilibrium
100. At the fairground, the force that balances out our weight is