SSC JE Electrical / Mock Test Series : 1

1. Statically induced E.M.F’s magnitude depends on the –

2. The power factor of practical inductor is

3. S.I unit of Reluctance-

4. Magnetic field strength is

5. The average half-cycle value of a sine wave with a 40 V peak is

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

7. The Inductor doesn’t allow sudden changes in

8. Unit of impedance is

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

10. The capacitor doesn’t allow sudden changes in

11. The voltage across the short is?

12. The square waveform of current has following relation between R.M.S. value and average value –

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

14. Magnetic lines of forces –

15. The instantaneous value is the voltage or current value of a waveform at its peak

16. Magnetic field has -

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

18. The reciprocal of resistivity is________

19. The direction of rotation of a dc motor is found out by

20. The energy stored by a capacitor is given by –

21. What is the power in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?

22. The flow of electron in solids is due to –

23. Unit of resistivity is

24. Which is the property of a coil by which a counter E.M.F is induced when the current through the coil changes?

25. What is the resistivity of Copper?

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

27. What happens to the current in the series circuit if the resistance is doubled?

28. Voltage across the 60 ohm resistor is______

29. The induced E.M.F. and current always oppose the cause of producing them is according to which law?

30. The reciprocal of permeability is –

31. The unit of frequency is the hertz

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

33. The unit of magnetic flux is –

34. Materials which easily allow the passage of electric current are known as ______

35. The current in each branch of a parallel circuit is proportional to _________

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

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

38. The frequency of an alternating current is –

39. What is the relation between resistance R and resistivity ρ of a wire ?

40. Transformer is a

41. The principle of electromagnetic induction was propounded by

42. When a permanent magnet is cut half what will be the result?

43. Magnetic field is proportional to the –

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

45. One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

46. Which rule do we use to predict the direction of movement of a current carrying wire in a magnetic field?

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

48. Reactive power is the product of

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

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

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

52. The expression for energy of an inductor

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

54. The most important advantage of using electrical energy in the form of a AC is –

55. Which is the most cost efficient connection?

56. Paramagnetic materials are –

57. Which of the following statements are true with regard to resistance?

58. Unit of magnetic flux density is in S.I.

59. Which of the following is unit less?

60. What is the value of x if the current in the circuit is 5 A?

61. When a sine wave has a frequency of 100 Hz in 12 s it goes through

62. Many resistors connected in series will?

63. The duty cycle of a pulse waveform with a pulse width of 10 µs and a period of 100 µs is 25%.

64. Strength of the electromagnet can be increased by increasing –

65. Which, among the following is a unit for resistivity?

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

67. What is the relation between resistance R and resistivity ρ of a wire ?

68. The power factor of an ordinary electric bulb is

69. The energy per unit charge is

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

71. What is the voltage measured across a series short?
a) b)  c)  d) 

72. The insulating medium between the two plates of capacitor is known as __________

73. Principle of dynamically induced E.M.F is used in a –

74. S.I unit of conductance is –

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

76. Magnetic lines of forces –

77. The length of a phasor represents the amplitude

78. To obtain a high value of capacitance, the permittivity of dielectric medium should be –

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

80. S.I unit of Power is –

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

82. Resistance of any circuit depends on –

83. Which of the following statements are true with regard to resistivity?

84. Transformer core are laminated in order to reduce –

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

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

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

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

89. Periodic is characterized by a repetition at fixed time intervals

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

91. The currents in the three branches of a parallel circuit are 3 A, 4 A and 5 A. What is the current leaving it?

92. Magnetic circuit is a closed path followed by –

93. The resistance of straight conductor is independent of-

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

95. The total resistance between A and B are?

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

97. The voltage across the open circuit is?

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

99. Sparking may occurs when a load is switched off due to the presence of –

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