SSC JE Electrical / Mock Test Series : 1

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

2. S.I unit of conductance is –

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

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

5. The Inductor doesn’t allow sudden changes in

6. The energy per unit charge is

7. The voltage across the open circuit is?

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

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

10. The frequency of an alternating current is –

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

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

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

14. The expression for energy of an inductor

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

16. Reactive power is the product of

17. The length of a phasor represents the amplitude

18. The power factor of an ordinary electric bulb is

19. The unit of frequency is the hertz

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

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

22. Magnetic lines of forces –

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

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

25. The power factor of practical inductor is

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

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

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

29. 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

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

31. Magnetic field strength is

32. The principle of electromagnetic induction was propounded by

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

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

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

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

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

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

39. The total resistance between A and B are?

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

41. What is the resistivity of Copper?

42. Magnetic field has -

43. Magnetic lines of forces –

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

45. Transformer core are laminated in order to reduce –

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

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

48. Resistance of any circuit depends on –

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

50. Unit of impedance is

51. Magnetic circuit is a closed path followed by –

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

53. Paramagnetic materials are –

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

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

56. Many resistors connected in series will?

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

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

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

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

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

62. Voltage across the 60 ohm resistor is______

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

64. S.I unit of Reluctance-

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

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

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

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

69. The unit of magnetic flux is –

70. Transformer is a

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

72. The resistance of straight conductor is independent of-

73. Which is the most cost efficient connection?

74. The reciprocal of permeability is –

75. Unit of resistivity is

76. The capacitor doesn’t allow sudden changes in

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

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

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

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

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

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

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

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

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

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

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

88. Which of the following is unit less?

89. 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?

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

91. The voltage across the short is?

92. S.I unit of Power is –

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

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

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

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

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

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

99. The reciprocal of resistivity is________

100. Magnetic field is proportional to the –