SSC JE Electrical / Mock Test Series : 1

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

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

3. The voltage across the open circuit is?

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

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

6. Magnetic field strength is

7. Magnetic circuit is a closed path followed by –

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

9. The capacitor doesn’t allow sudden changes in

10. The frequency of an alternating current is –

11. The total resistance between A and B are?

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

13. 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

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

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

16. Magnetic lines of forces –

17. The energy per unit charge is

18. Voltage across the 60 ohm resistor is______

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

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

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

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

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

24. Reactive power is the product of

25. The principle of electromagnetic induction was propounded by

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

27. Which of the following is unit less?

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

29. The power factor of an ordinary electric bulb is

30. What is the resistivity of Copper?

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

32. S.I unit of Power is –

33. S.I unit of Reluctance-

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

35. Transformer core are laminated in order to reduce –

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

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

38. Magnetic field is proportional to the –

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

40. The unit of magnetic flux is –

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

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

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

44. Unit of impedance is

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

46. The resistance of straight conductor is independent of-

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

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

49. Many resistors connected in series will?

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

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

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

53. The expression for energy of an inductor

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

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

56. Resistance of any circuit depends on –

57. Magnetic field has -

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

59. The length of a phasor represents the amplitude

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

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

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

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

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

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

66. The power factor of practical inductor is

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

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

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

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

71. The reciprocal of permeability is –

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

73. Which is the most cost efficient connection?

74. Magnetic lines of forces –

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

76. 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?

77. The voltage across the short is?

78. Transformer is a

79. Paramagnetic materials are –

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

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

82. Unit of resistivity is

83. The reciprocal of resistivity is________

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

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

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

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

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

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

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

91. S.I unit of conductance is –

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

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

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

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

96. The Inductor doesn’t allow sudden changes in

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

98. The unit of frequency is the hertz

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

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