SSC JE Electrical / Mock Test Series : 3

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

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

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

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

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

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

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

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

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

10. Active circuit have -

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

12. Absolute permittivity of dielectric medium is represented as –

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

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

15. 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.

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

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

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

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

20. Transformer core are laminated in order to reduce –

21. Form factor of square wave is-

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

23. Frequency of Direct Current is

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

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

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

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

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

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

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

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

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

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

34. A parallel AC circuit in resonance will –

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

36. Capacitors for power factor correction are rated in -

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

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

39. The Inductor doesn’t allow sudden changes in

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

41. The power factor of practical inductor is

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

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

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

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

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

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

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

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

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

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

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

53. Magnetic lines of forces –

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

55. A choke coil is a coil having-

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

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

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

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

60. In any AC circuit always –

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

62. The frequency of an alternating current is –

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

64. Transformer is a

65. 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?

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

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

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

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

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

71. The capacitor doesn’t allow sudden changes in

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

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

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

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

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

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

78. A magnetic field like this is called –

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

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

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

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

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

84. The expression for energy of an inductor

85. Form factor of half wave rectified ac is-

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

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

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

89. Battery is a

90. Unit of impedance is

91. The power factor of an ordinary electric bulb is

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

93. Reactive power is the product of

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

95. A phasor represents

96. 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?

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

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

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

100. 1 coulomb charge equals the charge of –