SSC JE Electrical / Mock Test Series : 3

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

2. Magnetic lines of forces –

3. Absolute permittivity of dielectric medium is represented as –

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

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

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

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

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

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

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

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

12. Unit of impedance is

13. Battery is a

14. 1 coulomb charge equals the charge of –

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

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

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

18. The frequency of an alternating current is –

19. The capacitor doesn’t allow sudden changes in

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

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

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

23. A choke coil is a coil having-

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

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

26. A magnetic field like this is called –

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

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

29. 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?

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

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

32. Frequency of Direct Current is

33. The power factor of an ordinary electric bulb is

34. 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?

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

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

37. Active circuit have -

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

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

40. A phasor represents

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

42. Form factor of square wave is-

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

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

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

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

47. The expression for energy of an inductor

48. Transformer core are laminated in order to reduce –

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

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

51. In any AC circuit always –

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

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

54. Form factor of half wave rectified ac is-

55. The power factor of practical inductor is

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

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

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

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

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

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

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

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

64. Transformer is a

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

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

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

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

69. Capacitors for power factor correction are rated in -

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

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

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

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

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

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

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

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

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

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

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

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

82. A parallel AC circuit in resonance will –

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

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

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

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

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

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

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

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

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

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

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

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

95. 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.

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

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

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

99. The Inductor doesn’t allow sudden changes in

100. Reactive power is the product of