SSC JE Electrical / Mock Test Series : 1

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

2. The principle of electromagnetic induction was propounded by

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

4. Resistance of any circuit depends on –

5. The Inductor doesn’t allow sudden changes in

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

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

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

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

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

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

12. The capacitor doesn’t allow sudden changes in

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

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

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

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

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

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

19. The expression for energy of an inductor

20. The energy per unit charge is

21. The total resistance between A and B are?

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

23. The reciprocal of permeability is –

24. The resistance of straight conductor is independent of-

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

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

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

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

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

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

32. The voltage across the short is?

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

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

35. The unit of magnetic flux is –

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

37. What is the resistivity of Copper?

38. The length of a phasor represents the amplitude

39. The voltage across the open circuit is?

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

41. Magnetic field strength is

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

43. S.I unit of conductance is –

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

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

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

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

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

49. The reciprocal of resistivity is________

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

51. Voltage across the 60 ohm resistor is______

52. Transformer is a

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

54. The power factor of practical inductor is

55. 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?

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

57. The unit of frequency is the hertz

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

59. Unit of impedance is

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

61. Magnetic lines of forces –

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

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

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

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

66. S.I unit of Reluctance-

67. Magnetic field has -

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

69. Which is the most cost efficient connection?

70. Reactive power is the product of

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

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

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

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

75. S.I unit of Power is –

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

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

78. The power factor of an ordinary electric bulb is

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

80. Many resistors connected in series will?

81. Paramagnetic materials are –

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

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

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

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

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

87. Magnetic circuit is a closed path followed by –

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

89. Transformer core are laminated in order to reduce –

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

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

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

93. Which of the following is unit less?

94. Magnetic lines of forces –

95. The frequency of an alternating current is –

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

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

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

99. Magnetic field is proportional to the –

100. Unit of resistivity is