SSC JE Electrical / Mock Test Series : 1

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

2. The Inductor doesn’t allow sudden changes in

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

4. Reactive power is the product of

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

6. Magnetic field is proportional to the –

7. The capacitor doesn’t allow sudden changes in

8. The power factor of an ordinary electric bulb is

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

10. The expression for energy of an inductor

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

12. The resistance of straight conductor is independent of-

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

14. Unit of resistivity is

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

16. The unit of magnetic flux is –

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

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

19. Unit of impedance is

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

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

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

23. The reciprocal of resistivity is________

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

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

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

27. S.I unit of conductance is –

28. Magnetic circuit is a closed path followed by –

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

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

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

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

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

34. The voltage across the open circuit is?

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

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

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

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

39. Which of the following is unit less?

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

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

42. S.I unit of Reluctance-

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

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

45. Magnetic field strength is

46. Magnetic field has -

47. Voltage across the 60 ohm resistor is______

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

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

50. The reciprocal of permeability is –

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

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

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

54. 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

55. The total resistance between A and B are?

56. The principle of electromagnetic induction was propounded by

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

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

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

60. Magnetic lines of forces –

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

62. Which is the most cost efficient connection?

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

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

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

66. Transformer core are laminated in order to reduce –

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

68. Many resistors connected in series will?

69. The length of a phasor represents the amplitude

70. S.I unit of Power is –

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

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

73. Transformer is a

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

75. The voltage across the short is?

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

77. The energy per unit charge is

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

79. The frequency of an alternating current is –

80. What is the resistivity of Copper?

81. Resistance of any circuit depends on –

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

83. The unit of frequency is the hertz

84. The power factor of practical inductor is

85. 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?

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

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

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

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

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

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 lines of forces –

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

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

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

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

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

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

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

100. Paramagnetic materials are –