SSC JE Electrical / Mock Test Series : 3

1. 1 coulomb charge equals the charge of –

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

3. The expression for energy of an inductor

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

5. A choke coil is a coil having-

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

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

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

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

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

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

12. Reactive power is the product of

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

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

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

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

17. Magnetic lines of forces –

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

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

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

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

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

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

24. A magnetic field like this is called –

25. The Inductor doesn’t allow sudden changes in

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

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

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

29. Capacitors for power factor correction are rated in -

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

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

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

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

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

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

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

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

38. Absolute permittivity of dielectric medium is represented as –

39. Active circuit have -

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

41. The capacitor doesn’t allow sudden changes in

42. 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?

43. The frequency of an alternating current is –

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

45. A phasor represents

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

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

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

49. A parallel AC circuit in resonance will –

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

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

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

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

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

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

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

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

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

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

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

61. Battery is a

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

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

64. Transformer is a

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

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

67. Transformer core are laminated in order to reduce –

68. The power factor of practical inductor is

69. 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.

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

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

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

73. Frequency of Direct Current is

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

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

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

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

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

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

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

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

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

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

84. In any AC circuit always –

85. The power factor of an ordinary electric bulb is

86. Form factor of square wave is-

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

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

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

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

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

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

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

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

95. 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?

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

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

98. Unit of impedance is

99. Form factor of half wave rectified ac is-

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