SSC JE Electrical / Mock Test Series : 3

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

2. The power factor of practical inductor is

3. Battery is a

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

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

6. The Inductor doesn’t allow sudden changes in

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

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

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

10. A phasor represents

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

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

13. 1 coulomb charge equals the charge of –

14. Frequency of Direct Current is

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

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

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

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

19. Form factor of half wave rectified ac is-

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

21. Active circuit have -

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

23. A choke coil is a coil having-

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

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

26. In any AC circuit always –

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

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

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

30. The expression for energy of an inductor

31. Capacitors for power factor correction are rated in -

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

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

34. Reactive power is the product of

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

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

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

38. 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?

39. 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.

40. The capacitor doesn’t allow sudden changes in

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

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

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

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

45. Absolute permittivity of dielectric medium is represented as –

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

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

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

49. Unit of impedance is

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

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

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

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

54. Transformer is a

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

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

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

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

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

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

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

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

63. The frequency of an alternating current is –

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

65. A magnetic field like this is called –

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

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

68. A parallel AC circuit in resonance will –

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

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

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

72. Magnetic lines of forces –

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

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

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

76. Transformer core are laminated in order to reduce –

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

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

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

80. Form factor of square wave is-

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

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

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

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

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

86. The power factor of an ordinary electric bulb is

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

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

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

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

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

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

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

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

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

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

97. 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?

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

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 –