SSC JE Electrical / Mock Test Series : 1

1. The reciprocal of permeability is –

2. Paramagnetic materials are –

3. S.I unit of conductance is –

4. Transformer core are laminated in order to reduce –

5. The unit of frequency is the hertz

6. Reactive power is the product of

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

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

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

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

11. Magnetic lines of forces –

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

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

14. Magnetic field strength is

15. The unit of magnetic flux is –

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

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

18. The Inductor doesn’t allow sudden changes in

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

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

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

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

23. Resistance of any circuit depends on –

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

25. The frequency of an alternating current is –

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

27. Many resistors connected in series will?

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

29. The reciprocal of resistivity is________

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

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

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

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

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

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

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

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

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

39. The expression for energy of an inductor

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

41. The total resistance between A and B are?

42. What is the resistivity of Copper?

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

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

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

46. Unit of impedance is

47. The energy per unit charge is

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

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

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

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

52. S.I unit of Power is –

53. The capacitor doesn’t allow sudden changes in

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

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

56. 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?

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

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

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

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

61. The power factor of an ordinary electric bulb is

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

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

64. Unit of resistivity is

65. The voltage across the short is?

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

67. The resistance of straight conductor is independent of-

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

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

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

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

72. Magnetic field has -

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

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

75. The voltage across the open circuit is?

76. S.I unit of Reluctance-

77. Magnetic circuit is a closed path followed by –

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

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

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

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

82. Magnetic field is proportional to the –

83. The principle of electromagnetic induction was propounded by

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

85. Voltage across the 60 ohm resistor is______

86. The power factor of practical inductor is

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

88. Which of the following is unit less?

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

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

91. The length of a phasor represents the amplitude

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

93. Transformer is a

94. Which is the most cost efficient connection?

95. Magnetic lines of forces –

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

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

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

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

100. 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