# AC Circuits (Part:- 2) MCQs with Answers

### Chapter 2. AC Circuits MCQs with Answers

61. Inductance is ________ to number of turns in the coil.
(a) Directly proportional

(b) Inversely proportional
(c) Equal
(d) Not related

62. Inductance is ________ to number of turns in the coil.
(a) Directly proportional
(b) Inversely proportional
(c) Equal
(d) Not related

63. Inductance is ________ to number of turns in the coil.
(a) Directly proportional
(b) Inversely proportional
(c) Equal
(d) Not related

64. Inductance is ________ to number of turns in the coil.
(a) Directly proportional
(b) Inversely proportional
(c) Equal
(d) Not related

65. In an inductive circuit, the current ______ the voltage?
(b) Lags
(c) Is greater than
(d) Is less than

66. In an inductive circuit, the current ______ the voltage?
(b) Lags
(c) Is greater than
(d) Is less than

67. In an inductive circuit, the current ______ the voltage?
(b) Lags
(c) Is greater than
(d) Is less than

68. In an inductive circuit, the current ______ the voltage?
(b) Lags
(c) Is greater than
(d) Is less than

69. For an RL circuit, the phase angle is always
(a) Positive
(b) Negative
(c) 0
(d) 90

70. For an RL circuit, the phase angle is always
(a) Positive
(b) Negative
(c) 0
(d) 90

71. For an RL circuit, the phase angle is always
(a) Positive
(b) Negative
(c) 0
(d) 90

72. For an RL circuit, the phase angle is always
(a) Positive
(b) Negative
(c) 0
(d) 90

73. What is the resonance condition?
(a) When XL > XC
(b) When XL
(c) When XL = XC
(d) When XC = infinity

74. What is the resonance condition?
(a) When XL > XC

(b) When XL
(c) When XL = XC
(d) When XC = infinity
Option (c)

75. What is the resonance condition?
(a) When XL > XC
(b) When XL
(c) When XL = XC
(d) When XC = infinity
Option (c)

76. What is the resonance condition?
(a) When XL > XC
(b) When XL
(c) When XL = XC
(d) When XC = infinity

77. What is the relation between reactance, resistance and impedance?
(a) Z = R + jX
(b) Z = R + X
(c) Z = R – X
(d) Z = R – jX

78. What is the relation between reactance, resistance and impedance?
(a) Z = R + jX
(b) Z = R + X
(c) Z = R – X
(d) Z = R – jX

79. What is the relation between reactance, resistance and impedance?
(a) Z = R + jX
(b) Z = R + X
(c) Z = R – X
(d) Z = R – jX

80. What is the relation between reactance, resistance and impedance?
(a) Z = R + jX
(b) Z = R + X
(c) Z = R – X
(d) Z = R – jX

81. In an RLC circuit, which of the following is always used as a vector reference?
(a) Voltage
(b) Resistance
(c) Impedance
(d) Current

82. In an RLC circuit, which of the following is always used as a vector reference?
(a) Voltage
(b) Resistance
(c) Impedance
(d) Current

83. In an RLC circuit, which of the following is always used as a vector reference?
(a) Voltage
(b) Resistance
(c) Impedance
(d) Current

84. In an RLC circuit, which of the following is always used as a vector reference?
(a) Voltage
(b) Resistance
(c) Impedance
(d) Current

85. Which of the following is not ac waveform?
(a) Sinusoidal
(b) Square
(c) Constant
(d) Triangular

86. Which of the following is not ac waveform?
(a) Sinusoidal
(b) Square
(c) Constant
(d) Triangular

87. Which of the following is not ac waveform?
(a) Sinusoidal

(b) Square
(c) Constant
(d) Triangular

88. Which of the following is not ac waveform?
(a) Sinusoidal
(b) Square
(c) Constant
(d) Triangular

89. The energy stored in the capacitor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

90. The energy stored in the capacitor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

91. The energy stored in the capacitor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

92. The energy stored in the capacitor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

93. The energy stored in the inductor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

94. The energy stored in the inductor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

95. The energy stored in the inductor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

96. The energy stored in the inductor is of ______ nature.
(a) Electrostatic
(b) Magnetic
(c) Neither electrostatic nor magnetic
(d) Either electrostatic or magnetic

97. What is the strength of magnetic field known as _____
(a) Flux
(b) Density
(c) Magnetic strength
(d) Magnetic Flux Density

98. What is the strength of magnetic field known as _____
(a) Flux
(b) Density
(c) Magnetic strength
(d) Magnetic Flux Density

99. What is the strength of magnetic field known as _____
(a) Flux
(b) Density
(c) Magnetic strength
(d) Magnetic Flux Density

100. What is the strength of magnetic field known as _____
(a) Flux

(b) Density
(c) Magnetic strength
(d) Magnetic Flux Density

101. E.M.F. means _______
(a) Electromotive Force
(b) Electromagnetic Force
(c) Electromagnetic Flux
(d) Electromotive Flux

102. E.M.F. means _______
(a) Electromotive Force
(b) Electromagnetic Force
(c) Electromagnetic Flux
(d) Electromotive Flux

103. E.M.F. means _______
(a) Electromotive Force
(b) Electromagnetic Force
(c) Electromagnetic Flux
(d) Electromotive Flux

104. E.M.F. means _______
(a) Electromotive Force
(b) Electromagnetic Force
(c) Electromagnetic Flux
(d) Electromotive Flux

105. An EMF can be induced by __________
(a) Change in the magnetic field only
(b) Change in the area of cross section only
(c) Change in angle between magnetic field and area only
(d) Change in the magnetic field, area or angle between them

106. An EMF can be induced by __________
(a) Change in the magnetic field only
(b) Change in the area of cross section only
(c) Change in angle between magnetic field and area only
(d) Change in the magnetic field, area or angle between them

107. An EMF can be induced by __________
(a) Change in the magnetic field only
(b) Change in the area of cross section only
(c) Change in angle between magnetic field and area only
(d) Change in the magnetic field, area or angle between them

108. An EMF can be induced by __________
(a) Change in the magnetic field only
(b) Change in the area of cross section only
(c) Change in angle between magnetic field and area only
(d) Change in the magnetic field, area or angle between them

109. The period of a wave is _________
(a) the same as frequency
(b) time required to complete one cycle
(c) expressed in amperes
(d) none of the above

110. The period of a wave is _________
(a) the same as frequency
(b) time required to complete one cycle
(c) expressed in amperes
(d) none of the above

111. The period of a wave is _________
(a) the same as frequency
(b) time required to complete one cycle
(c) expressed in amperes
(d) none of the above

112. The period of a wave is _________
(a) the same as frequency
(b) time required to complete one cycle
(c) expressed in amperes
(d) none of the above

113. The period of a sine wave is 0.02 seconds, its frequency is ________
(a) 20 Hz

(b) 30 Hz
(c) 40 Hz
(d) 50 Hz

114. The period of a sine wave is 0.02 seconds, its frequency is ________
(a) 20 Hz
(b) 30 Hz
(c) 40 Hz
(d) 50 Hz

115. The period of a sine wave is 0.02 seconds, its frequency is ________
(a) 20 Hz
(b) 30 Hz
(c) 40 Hz
(d) 50 Hz

116. The period of a sine wave is 0.02 seconds, its frequency is ________
(a) 20 Hz
(b) 30 Hz
(c) 40 Hz
(d) 50 Hz

117. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to ____
(a) Average value
(b) RMS value
(c) Peak value
(d) None of the above

118. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to ____
(a) Average value
(b) RMS value
(c) Peak value
(d) None of the above

119. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to ____
(a) Average value
(b) RMS value
(c) Peak value
(d) None of the above

120. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to ____
(a) Average value
(b) RMS value
(c) Peak value
(d) None of the above