1. If an object moves a circular distance ‘s’ of radius ‘r’, then it's angular displacement is {{}}
Correct : A. s⁄r
2. Speed of an object travelling around a circle depends upon
Correct : D. both A and B
3. Number of degree a complete circle represents is
Correct : D. 360°
4. When a body is moving along a circular path, it's velocity is directed towards
Correct : C. tangent
5. Speed is unchanged because work done on an object is
Correct : A. zero
6. 180° is equal to{{}}
Correct : B. π rad
7. For the minute hand of the clock, the angular velocity is equal to {{}}
Correct : D. 0.00175 rad s-1
8. 105° in radians is equal to
Correct : C. 1.83 rad
9. 1 rad is equal to
Correct : A. 57.3°
10. According to Newton's 2nd law the object's acceleration and centripetal force are
Correct : D. in same direction
11. A stone whirling in a horizontal circle on the end of string depicts
Correct : A. conical pendulum
12. Centripetal force is directed towards the
Correct : B. center
13. Velocity required by an object to orbit around Earth is{{}}
Correct : C. 8 km s-1
14. As compared to sound waves the frequency of radio waves is
Correct : B. higher
15. Decrease in strength of signal is known as
Correct : C. attenuation
16. If frequency of modulated wave is less than frequency of carrier wave, then input signal is
Correct : A. negative
17. At the end of communication system, the signal is converted from radio to
Correct : A. sound
18. Energy is lost in wires due to
Correct : D. both A and B
19. Voltage signal generated by a microphone is
Correct : B. analogue in nature
20. Phenomena in which signal transmitted in one circuit creates undesired effect in other circuit is known as
Correct : D. crosslinking
21. Digital number 9 can be represented in binary number as
Correct : B. 1001
22. Geostationary satellite has period
Correct : B. same as Earth
23. Bit on left hand side has
Correct : C. highest value
24. A digital quantity has
Correct : A. only 2 values
25. Frequency of sky waves is
Correct : B. more than 3 MHz
26. Each digit in a binary number is known as a
Correct : A. bit
27. Value of sampled signal is used to produce a
Correct : A. binary number
28. Data in compact disc is stored in form of
Correct : B. digital signal
29. With a 30 m long coaxial cable, the bandwidth can exceed
Correct : A. 100 MHz
30. Amplitude of modulated wave is in phase with
Correct : D. signal
31. Variation in amplitude or frequency of carrier wave is called
Correct : C. modulation
32. In frequency modulation, amplitude of modulated wave is
Correct : C. constant
33. High quality music only needs frequencies up to
Correct : D. 15 kHz
34. Binary system has base
Correct : D. 2
35. In FM, frequency of modulated wave varies with
Correct : B. time
36. Unwanted signal that distorts a transmitted signal is called
Correct : B. noise
37. First communication satellites used frequencies of
Correct : A. 6 GHz for uplink
38. A wave of frequency 1 GHz has wavelength of
Correct : D. 0.3 m
39. Semiconductors have electron number density of order{{}}
Correct : D. 10 23 m-3
40. A straight line symbol shows the
Correct : C. connecting lead
41. Rate of flow of electric charge is
Correct : A. electric current
42. instrument which transfers energy to electric charges in a circuit is
Correct : A. battery
43. Electric power is related to
Correct : D. both A and B
44. If a current of 1 A passes through a point in 1 s then charge passes that point is
Correct : C. 1 C
45. Energy transferred per unit charge is
Correct : C. potential difference
46. Current in a circuit when a charge of 180 C passes a point in a circuit in 2 minutes is
Correct : D. 1.5 A
47. Electrons which are free to move around are also called
Correct : A. conduction electrons
48. Number of conduction electrons per unit volume is
Correct : B. number density
49. Current in a circuit if resistance of 15 Ω and potential difference of 3.0 V is applied across it's ends is
Correct : D. 0.20 A
50. Number density for copper is {{}}
Correct : C. 10 29 m-3
51. Mean drift velocity of electron in a copper wire having cross-sectional area 5.0 × 10 -6 m2 carrying current of 1 A and having number density 8.5 × 10 28 m3 is {{}}
Correct : A. 0.015 mm s-1
52. Magnitude of charge is known as
Correct : B. elementary charge
53. 1 Ω is equal to
Correct : B. 1 V A-1
54. To protect wiring from excessive passing of current is
Correct : B. fuse
55. Current in a 60 W light bulb when it is connected to a 230 V power
supply is
Correct : A. 0.26 A
56. Grid cables are 15 km long with a resistance of 0.20 Ω km-1, powers wasted as heat in these cables are
Correct : D. 30 kW
57. Actual velocity of electrons between collisions is
Correct : D. 105 m s-1
58. By increasing the current, the drift velocity
Correct : B. increases
59. Current in a circuit depends on
Correct : C. both A and B
60. If direction of current is from positive to negative, then it is called
Correct : B. conventional current only
61. A voltmeter arranged across the power supply measures
Correct : B. e.m.f
62. Particles involved in the movement within material are
Correct : B. electrons
63. Phenomena in which a charged body attract uncharged body is called
Correct : A. electrostatic induction
64. An uncharged object has
Correct : C. equal electrons and protons
65. Fields that act on objects with masses are
Correct : D. gravitational fields
66. Where an electric charge experiences a force, there is an
Correct : A. electric field
67. A field that spreads outwards in all directions is
Correct : A. radial
68. At all the points the uniform fields have
Correct : B. same strength
69. Electric field strength on a dust particle having charge equal to 8 × 10 - 19 when plates are separated by distance of 2 cm and have a potential difference of 5 kV is {{}}
Correct : A. 2.0 × 10 -13 N
70. Electric field strength can be defined as
Correct : C. E =F⁄Q
71. When one material is rubbed against the other, then it becomes
electrically
Correct : B. charged
72. When an electron is moving horizontally between oppositely charged
plates, it will move in the
Correct : D. curved path
73. E.M.F can be induced in a circuit by
Correct : D. all of above
74. A straight wire of length 0.20 m moves at a steady speed of {{}} 3.0 m s-1 at right angles to the magnetic field of flux density 0.10 T. The e.m.f induced across ends of wire is
Correct : B. 0.06 V
75. By accelerating the magnet inside the coil, the current in it
Correct : A. increases
76. Consequence of motor effect is
Correct : A. electromagnetic induction
77. Total number of magnetic field lines passing through an area is called
Correct : B. magnetic flux
78. Magnitude of induced e.m.f is proportional to
Correct : C. rate of change of magnetic flux linkage
79. In transformer, the core is made up of soft iron in order to pass the maximum
Correct : C. magnetic flux
80. For a straight wire, induced current depends upon
Correct : D. all of above
81. In generators, the rate of change of flux linkage is maximum when the coil is moving through the
Correct : B. horizontal position
82. E.M.F for a coil depends upon
Correct : D. all of above
83. Currents that flow in circles inside a disc are known as
Correct : A. eddy currents
84. When field is parallel to plane of area, magnetic flux through coil is
Correct : A. zero
85. Moving a coil in and out of magnetic field induces
Correct : C. e.m.f
86. Induced current in coil by a magnet turns it into an
Correct : D. electromagnet
87. Strength of magnetic field is known as
Correct : D. magnetic flux density
88. Unit of luminous intensity is
Correct : C. cd
89. For a hydrogen atom the electrical force as compared to gravitational force is{{}}
Correct : A. 1039 times
90. Weakest force in nature is
Correct : B. gravitational force
91. Magnetic field can be produced by using
Correct : D. both A and B
92. Whenever there is force on magnetic pole, there exists
Correct : A. magnetic field
93. If the magnetic flux density and current are at right angles, then component of force acting on the conductor is
Correct : B. BIL sinθ
94. Unraveling an electromagnetic gives
Correct : B. weaker field
95. Force per meter on two wires carrying a current of 1 A placed 1 m apart is equal to {{}}
Correct : C. 2.0 × 10 -7 N
96. F = BIL can only be used if the magnetic field and electric current are
Correct : A. at right angles to each other
97. Derived unit Tesla is related to
Correct : D. all of above
98. If we reverse the direction of electric current, then the direction of magnetic field will be