SSC JE Electrical / Mock Test Series : 3

1. Reactive power is the product of

2. Active circuit have -

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

4. 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?

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

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

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

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

9. 1 coulomb charge equals the charge of –

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

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

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

13. The power factor of an ordinary electric bulb is

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

15. A magnetic field like this is called –

16. The power factor of practical inductor is

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

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

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

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

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

22. Frequency of Direct Current is

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

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

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

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

27. Absolute permittivity of dielectric medium is represented as –

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

29. The Inductor doesn’t allow sudden changes in

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

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

32. A parallel AC circuit in resonance will –

33. Transformer is a

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

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

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

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

38. The capacitor doesn’t allow sudden changes in

39. Unit of impedance is

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

41. The frequency of an alternating current is –

42. A choke coil is a coil having-

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

44. Transformer core are laminated in order to reduce –

45. 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?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

62. Battery is a

63. The expression for energy of an inductor

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

83. 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.

84. Form factor of half wave rectified ac is-

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

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

87. Magnetic lines of forces –

88. A phasor represents

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

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

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

92. Capacitors for power factor correction are rated in -

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

94. Form factor of square wave is-

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

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

97. In any AC circuit always –

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

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

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