SSC JE Electrical / Mock Test Series : 3

1. Capacitors for power factor correction are rated in -

2. A parallel AC circuit in resonance will –

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

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

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

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

7. Form factor of square wave is-

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

9. The power factor of an ordinary electric bulb is

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

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

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

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

14. Frequency of Direct Current is

15. The frequency of an alternating current is –

16. 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.

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

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

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

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

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

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

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

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

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

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

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

28. The power factor of practical inductor is

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

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

31. Reactive power is the product of

32. Active circuit have -

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

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

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

36. A choke coil is a coil having-

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

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

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

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

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

42. 1 coulomb charge equals the charge of –

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

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

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

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

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

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

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

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

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

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

53. Absolute permittivity of dielectric medium is represented as –

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

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

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

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

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

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

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

61. 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?

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

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

64. Unit of impedance is

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

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

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

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

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

70. 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?

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

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

73. Battery is a

74. A phasor represents

75. Form factor of half wave rectified ac is-

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

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

78. Magnetic lines of forces –

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

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

81. Transformer core are laminated in order to reduce –

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

83. A magnetic field like this is called –

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

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

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

87. Transformer is a

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

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

90. The expression for energy of an inductor

91. The Inductor doesn’t allow sudden changes in

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

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

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

95. In any AC circuit always –

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

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

98. The capacitor doesn’t allow sudden changes in

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

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