SSC JE Electrical / Mock Test Series : 1

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

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

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

4. The capacitor doesn’t allow sudden changes in

5. The power factor of an ordinary electric bulb is

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

7. The energy per unit charge is

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

9. Which is the most cost efficient connection?

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

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

12. The length of a phasor represents the amplitude

13. 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?

14. Resistance of any circuit depends on –

15. Unit of impedance is

16. The Inductor doesn’t allow sudden changes in

17. The reciprocal of permeability is –

18. The voltage across the open circuit is?

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

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

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

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

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

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

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

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

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

28. The resistance of straight conductor is independent of-

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

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

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

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

33. The voltage across the short is?

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

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

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

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

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

39. Magnetic field has -

40. Magnetic lines of forces –

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

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

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

44. 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

45. Magnetic lines of forces –

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

47. Voltage across the 60 ohm resistor is______

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

49. Paramagnetic materials are –

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

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

52. Magnetic circuit is a closed path followed by –

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

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

55. Magnetic field is proportional to the –

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

57. Magnetic field strength is

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

59. The total resistance between A and B are?

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

61. The frequency of an alternating current is –

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

63. Reactive power is the product of

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

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

66. The power factor of practical inductor is

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

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

69. The principle of electromagnetic induction was propounded by

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

71. Transformer is a

72. Which of the following is unit less?

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

74. The reciprocal of resistivity is________

75. S.I unit of Reluctance-

76. What is the resistivity of Copper?

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

78. S.I unit of Power is –

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

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

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

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

83. The expression for energy of an inductor

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

85. Transformer core are laminated in order to reduce –

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

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

88. S.I unit of conductance is –

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

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

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

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

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

94. The unit of magnetic flux is –

95. The unit of frequency is the hertz

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

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

98. Unit of resistivity is

99. Many resistors connected in series will?

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