SSC JE Electrical / Mock Test Series : 1

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

2. The voltage across the open circuit is?

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

4. Magnetic circuit is a closed path followed by –

5. The reciprocal of resistivity is________

6. S.I unit of conductance is –

7. The length of a phasor represents the amplitude

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

9. The voltage across the short is?

10. The unit of magnetic flux is –

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

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

13. Which is the most cost efficient connection?

14. The unit of frequency is the hertz

15. Magnetic lines of forces –

16. Voltage across the 60 ohm resistor is______

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

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

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

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

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

22. Resistance of any circuit depends on –

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

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

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

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

27. 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

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

29. S.I unit of Power is –

30. The expression for energy of an inductor

31. Magnetic lines of forces –

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

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

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

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

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

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

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

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

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

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

43. The Inductor doesn’t allow sudden changes in

44. Unit of impedance is

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

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

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

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

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

50. What is the resistivity of Copper?

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

52. S.I unit of Reluctance-

53. The energy per unit charge is

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

55. Paramagnetic materials are –

56. The capacitor doesn’t allow sudden changes in

57. The power factor of an ordinary electric bulb is

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

59. Magnetic field is proportional to the –

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

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

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

63. The total resistance between A and B are?

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

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

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

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

68. The resistance of straight conductor is independent of-

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

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

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

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

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

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

75. The frequency of an alternating current is –

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

77. The principle of electromagnetic induction was propounded by

78. Which of the following is unit less?

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

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

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

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

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

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

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

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

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

88. Many resistors connected in series will?

89. Magnetic field has -

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

91. Magnetic field strength is

92. The power factor of practical inductor is

93. The reciprocal of permeability is –

94. Unit of resistivity is

95. Transformer is a

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

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

98. Reactive power is the product of

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

100. Transformer core are laminated in order to reduce –