SSC JE Electrical / Mock Test Series : 3

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

2. 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.

3. A phasor represents

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

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

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

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

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

9. Form factor of square wave is-

10. The power factor of practical inductor is

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

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

13. The frequency of an alternating current is –

14. Transformer is a

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

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

17. A choke coil is a coil having-

18. Absolute permittivity of dielectric medium is represented as –

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

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

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

22. A magnetic field like this is called –

23. The Inductor doesn’t allow sudden changes in

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

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

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

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

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

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

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

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

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

33. The power factor of an ordinary electric bulb is

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

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

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

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

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

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

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

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

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

43. Transformer core are laminated in order to reduce –

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

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

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

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

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

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

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

51. Magnetic lines of forces –

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

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

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

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

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

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

58. Frequency of Direct Current is

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

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

61. A parallel AC circuit in resonance will –

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

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

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

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

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

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

68. The capacitor doesn’t allow sudden changes in

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

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

72. In any AC circuit always –

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

74. Form factor of half wave rectified ac is-

75. Active circuit have -

76. 1 coulomb charge equals the charge of –

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

78. Reactive power is the product of

79. Unit of impedance is

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

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

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

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

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

85. Battery is a

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

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

88. The expression for energy of an inductor

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

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

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

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

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

94. 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?

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

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

97. Capacitors for power factor correction are rated in -

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

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

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