SSC JE Electrical / Mock Test Series : 3

1. Which DC motor is preferred for wide range of speed regulation?

2. What will be the Q-factor of a circuit, if power factor is 0.9?

3. The Inductor doesn’t allow sudden changes in

4. In series R-L circuit power factor can be defined as –

5. In series R-L circuit power factor can be defined as –

6. A wire of length 2m and another wire of length 5m are made up of the same material and have the same area of cross section, which wire has higher resistance?

7. Amplitude is the maximum value of a voltage or current

8. If a capacitor is connected with DC supply, it will act as –

9. The component of current which is in quadrature with supply voltage, is –

10. The power factor of an AC circuit lies between –

11. A choke coil is a coil having-

12. Calculate the value of energy stored in an inductor if the value of inductance is 10H and 2A of current flows through it.-

13. The frequency of an AC voltage,e= 100 cos 314t , will be –

14. In a R-L-C circuit, power loss takes place is –

15. For a sinusoidal AC voltage, amplitude factor is –

16. In a series R-C circuit, the applied voltage –

17. In an AC circuit (Sine wave) with R and L in series –

18. The form factor for a sinusoidal a.c. voltage is – 

19. An alternating voltage is given by, V = 10 sin 2πt. The frequency of the AC signal is –

20. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is

21. In a R-L-C circuit, power loss takes place is – 

22. The RMS value of a sine wave is 100 A. Its peak value is –

23. In an AC circuit a low value of KVAR compared with KW indicates –

24. Real part and imaginary part of admittance are respectively –

25. Unit of impedance is

26. An electric incandescent lamp has the power factor of –

27. If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor.

28. If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is –

29. In series R-L circuit power factor can be defined as –

30. Magnetic lines of forces –

31. Absolute permittivity of dielectric medium is represented as –

32. A coil of many circular turns of wire wrapped in the shape of a cylinder is known as -

33. The power factor of practical inductor is

34. A bulb consumes 100 W when supply voltage is 200 V. Then find the energy consumed in 30 minutes.

35. A 20 kHz pulse waveform consists of pulses that are 15 μs wide. The duty cycle is 

36. For a sinusoidal AC voltage, peak factor or amplitude fator or crest factor is –

37. RMS value can be defined based on which of the following? –

38. In an AC circuit (Sine wave) with R and L in series –

39. A magnetic field like this is called –

40. In any AC circuit always –

41. The equation for instantaneous value of alternating current is, then time period will be –

42. Frequency of Direct Current is

43. Which of the following is used to determine the direction of rotation of D.C motor?

44. Transformer is a

45. The frequency of an alternating current is –

46. In series R-L circuit power factor can be defined as - 

47. With the star delta starter the voltage across the motor winding at starting is – 

48. For a sinusoidal AC voltage, amplitude factor is –

49. 1 coulomb charge equals the charge of –

50. Transformer core are laminated in order to reduce –

51. A phasor represents

52. The formula used to find the capacitance C is __________

53. What is the RMS value of the current if the maximum value of sine wave current is 100 A?

54. Capacitors for power factor correction are rated in -

55. Direction of DC motor can be found out by-

56. In a series R-C circuit, the applied voltage –

57. Reactive power is the product of

58. If the inductive reactance of a coil is 6 ohm and internal resistance is 8 ohm, then the impedance will be –

59. The frequency of an AC voltage in India, is–

60. Form factor of square wave is-

61. Battery is a

62. The expression for energy of an inductor

63. A saw-tooth wave has a period of 10 ms. Its frequency is

64. A parallel AC circuit in resonance will –

65. Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out?

66. A pure capacitance connected across 50 Hz, 230 V supply consumes 0.04 W. This consumption is attributed to –

67. In a R-L-C series circuit, if the inductive reactance is greater than the capacitive reactance, then the power factor will be –

68. Three nos 6-ohm resistances are connected in delta. Value of resistances if connected in star – 

69. The peak value of a sine wave is 200 V. Its average value is –

70. In a R-L-C series circuit, if the capacitive reactance is greater than the inductive reactance, then the power factor will be –

71. A sine wave has a frequency of 50 Hz. Its angular frequency is _______radian/second.

72. A wire has the same resistance as the one given in the figure. Calculate its resistivity if the length of the wire is 10m and its area of cross section is 2m.

73. An Inductor works as a ___________ circuit for DC supply.

74. If the voltage across a capacitor is constant, then current passing through it is ________

75. From the following when capacitive reactance will be more?

76. For a sinusoidal AC voltage, amplitude factor is –

77. An Alternating Current has a periodic time of 0.02 sec, then the frequency will be –

78. The alternative name/names for active power is/are –

79. A signal with a 400 μs period has a frequency of

80. The units for inductance is _________ and capacitance is ___________

81. Form factor of half wave rectified ac is-

82. If the length of a wire is doubled and diameter is halved, then the resistance will become _________ of the previous.

83. The direction of rotation of a dc generator is found out by

84. RMS value can be defined based on which of the following? –

85. A heater is rated as 230 V, 10 kW. The value 230 V refers to –

86. Active circuit have -

87. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

88. A 1 kHz signal has a period of 1 ms

89. For a pure inductive circuit, the average demand of power from the source will be –

90. When an alternating current passes through an Ohmic resistance the electrical power converted into heat is –

91. A current is set to be alternating when it changes –

92. For a 55KVA, 11000 Volts/440 Volts, 50Hz single phase transformer, the values of primary and secondary currents are –

93. RMS value can be defined based on which of the following? –

94. The power factor of an ordinary electric bulb is

95. A 2 micro farad capacitor connected across 10 volt DC. Value of current is – 

96. Which of the following will not be affected due to change in R?

97. Two waves of the same frequency have opposite phase when the phase angle between them is –

98. An alternating voltage is given by, V = 10 sin 2πt. The frequency of the AC signal is –

99. A wire having an area of cross section = 10sqm and another wire having an area of cross section= 15sqm, have the same length and are made up of the same material. Which wire has more resistance?

100. The capacitor doesn’t allow sudden changes in