SSC JE Electrical / Mock Test Series : 1

1. Resistance of any circuit depends on –

2. Magnetic field has -

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

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

5. The length of a phasor represents the amplitude

6. Many resistors connected in series will?

7. Magnetic lines of forces –

8. The reciprocal of permeability is –

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

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

11. Magnetic field is proportional to the –

12. The expression for energy of an inductor

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

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

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

16. The principle of electromagnetic induction was propounded by

17. Which of the following is unit less?

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

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

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

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

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

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

24. Magnetic circuit is a closed path followed by –

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

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

27. The capacitor doesn’t allow sudden changes in

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

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

30. S.I unit of Power is –

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

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

33. 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?

34. The reciprocal of resistivity is________

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

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

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

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

39. S.I unit of conductance is –

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

41. S.I unit of Reluctance-

42. The unit of frequency is the hertz

43. 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

44. Paramagnetic materials are –

45. Unit of impedance is

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

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

48. Magnetic lines of forces –

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

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

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

52. Which is the most cost efficient connection?

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

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

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

56. The voltage across the open circuit is?

57. The power factor of practical inductor is

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

59. The resistance of straight conductor is independent of-

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

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

62. Voltage across the 60 ohm resistor is______

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

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

65. Transformer core are laminated in order to reduce –

66. The Inductor doesn’t allow sudden changes in

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

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

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

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

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

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

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

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

75. Transformer is a

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

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

78. The total resistance between A and B are?

79. Magnetic field strength is

80. The power factor of an ordinary electric bulb is

81. The frequency of an alternating current is –

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

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

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

85. Unit of resistivity is

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

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

88. What is the resistivity of Copper?

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

90. The unit of magnetic flux is –

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

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

93. Reactive power is the product of

94. The energy per unit charge is

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

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

97. The voltage across the short is?

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

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

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