71. For a series circuit, the higher the quality factor
A. The greater the bandwidth
B. The narrower the passband
C. The broader the resonance curve
D. The wider the pass band
72. “Any resistance R in a branch of a network in which a current I is flowing can be replaced by a voltage equal to IR”. This states
A. Compensation theorem
B. Reciprocity theorem
C. Millman’s theorem
D. Superposition theorem
73. The internal resistance of an ideal current source is
A. Infinite
B. Zero
C. Equal to the load resistance
D. To be determined
74. If three 100-pF capacitors are connected in series, then the total capacitance is
A. 300 pF
B. 100 pF
C. 50 pF
D. 33.3 pF
75. An inductance of 1 mH is
A. 0.001 H
B. 0.01 H
C. 0.0001 H
D. 0.10 H
76. A capacitor is basically constructed of
A. Two conductors separated by a dielectric
B. Two dielectric separated by a conductor
C. Conductors and dielectric
D. Conductors and semiconductors
77. In an inductive coil, the rate of rise of current is maximum
A. Near the final maximum value of current
B. At mid-value of current
C. At half-power points
D. After one time constant
78. Two complex numbers or phasors are said to be conjugate if they
A. Differ only in the algebraic sign of their quadratic components
B. Differ only in the algebraic sign of their real components
C. Are equal in their real and quadrature components including algebraic signs
D. Are equal in their real components but differ in their quadrature components including algebraic signs.
79. In an ac circuit with a resistive branch and an inductive branch in parallel, the
A. Voltage across the inductance leads the voltage across the resistance by 90°
B. Resistive branch current is 90° out of phase with the inductive branch current
C. Resistive and inductive branch currents have the same phase
D. Resistive and inductive branch currents are 180° out-of-phase
80. In an ac circuit with XL and R in series, the
A. Voltages across R and XL are in phase
B. Voltage across R lags the voltage across XL by 90°
C. Voltages across R and XL are 180° out-of-phase
D. Voltage across R leads the voltage across XL by 90°
81. Leakage resistance in a capacitor results into
A. Internal heating
B. Internal bleeding
C. Shorter useful life
D. Short-circuiting
82. Voltage resonance means
A. Series resonance
B. Parallel resonance
C. Current magnification
D. Gain magnification
83. The unit of elastance is
A. Farad
B. Daraf
C. Siemen
D. Henry
84. The farad is not equivalent to which of the following combination of units
A. CV2
B. C2/J
C. C/V
D. J/V2
85. Which component opposes voltage change?
A. Resistor
B. Inductor
C. Capacitor
D. Transistor
86. What is the peak factor for alternating current or voltage varying sinusiodally?
A. 1.4142
B. 0.707
C. 0.636
D. 1.11
87. Which of the following is not a factor affecting dielectric strength?
A. Mass
B. Moisture content
C. Temperature
D. Thickness
88. The superposition theorem is used when the circuit contains
A. Reactive elements
B. Active elements
C. Number of voltage sources
D. Single voltage source
89. What refers to such work at very low temperatures, near absolute zero?
A. Cryogenics
B. Superconductivity
C. Subsonic
D. Thermionic
90. A factor that states how much the resistance changes for a change in temperature?
A. Resistivity
B. Specific resistance
C. Coefficient of temperature change
D. Temperature coefficient of resistance
91. An alloy composed of 84 % copper, 12 % manganese and 4 % nickel.
A. Manganin
B. Constantan
C. Nichrome
D. German silver wire
92. A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in series, the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
A. Child’s law
B. CR law
C. Coulomb’s law
D. Debye T3 law
93. At parallel resonance, the currents flowing through L and C are
A. Infinite
B. Zero
C. Unequal
D. Equal
94. In a rectangular wave, the peak factor is
A. 1.16
B. 1.73
C. 1.11
D. 1.0
95. In an RL series circuit,
A. Current lags voltage by less than 90˚
B. Current lags voltage by 180˚
C. Current lags voltage by 90˚
D. Current leads voltage by 90˚
96. In a pure capacitance,
A. Current leads voltage by 90˚
B. Current leads voltage by 180˚
C. Current lags voltage by 90˚
D. Current lags voltage by 180˚
97. The ohmic value of a resistor with negative temperature coefficient
A. Increases with increasing temperature
B. Increase with decreasing temperature
C. Stays unchanged with temperature change
D. Stays unaffected even with increasing temperature
98. Which of the statements below is not true?
A. Current source is an active element
B. Resistor is a linear element
C. Voltage source is a passive element
D. Diode is a non-linear element
99. Which of the following elements is active?
A. Resistor
B. Inductor
C. Capacitor
D. Ideal voltage source
100. What is the complex impedance of a circuit with an absolute resistance of 300 Ω?
A. 0 + j 300 Ω
B. 300 + j 90 Ω
C. 0 – j 300 Ω
D. 300 + j 0 Ω
