SSC JE Electrical / Mock Test Series : 3

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

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

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

4. A phasor represents

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

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

7. Active circuit have -

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

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

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

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

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

13. The capacitor doesn’t allow sudden changes in

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

15. Form factor of half wave rectified ac is-

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

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

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

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

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

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

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

23. Capacitors for power factor correction are rated in -

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

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

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

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

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

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

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

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

32. Magnetic lines of forces –

33. Transformer core are laminated in order to reduce –

34. Battery is a

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

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

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

38. A parallel AC circuit in resonance will –

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

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

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

42. The Inductor doesn’t allow sudden changes in

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

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

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

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

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

48. The frequency of an alternating current is –

49. Frequency of Direct Current is

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

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

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

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

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

55. 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?

56. Transformer is a

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

58. In any AC circuit always –

59. Reactive power is the product of

60. The power factor of an ordinary electric bulb is

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

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

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

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

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

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

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

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

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

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

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

72. 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.

73. A choke coil is a coil having-

74. Absolute permittivity of dielectric medium is represented as –

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

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

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

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

79. The expression for energy of an inductor

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

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

82. A magnetic field like this is called –

83. The power factor of practical inductor is

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

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

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

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

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

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

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

93. 1 coulomb charge equals the charge of –

94. Unit of impedance is

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

96. Form factor of square wave is-

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

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

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

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