SSC JE Electrical / Mock Test Series : 3

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

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

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

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

5. Magnetic lines of forces –

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

7. 1 coulomb charge equals the charge of –

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

9. A phasor represents

10. The frequency of an alternating current is –

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

12. Frequency of Direct Current is

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

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

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

16. In any AC circuit always –

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

18. 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.

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

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

21. A parallel AC circuit in resonance will –

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

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

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

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

26. 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?

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

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

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

30. The Inductor doesn’t allow sudden changes in

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

32. The capacitor doesn’t allow sudden changes in

33. Absolute permittivity of dielectric medium is represented as –

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

35. A choke coil is a coil having-

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

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

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

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

40. Form factor of half wave rectified ac is-

41. Reactive power is the product of

42. The power factor of an ordinary electric bulb is

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

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

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

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

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

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

49. Battery is a

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

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

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

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

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

55. Transformer is a

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

57. Transformer core are laminated in order to reduce –

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

79. Unit of impedance is

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

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

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

83. Active circuit have -

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

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

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

87. 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?

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

89. Form factor of square wave is-

90. A magnetic field like this is called –

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

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

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

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

95. The expression for energy of an inductor

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

97. The power factor of practical inductor is

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

99. Capacitors for power factor correction are rated in -

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