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.Management Sciences
Category: A.C. Fundamentals, Circuits and Circuit Theory
A parallel AC. circuit in resonance will__________?
A. have a high voltage developed across each inductive and capacitive section
B. have a high impedance
C. act like a resistor of low value
D. have current in each section equal to the line current
Pure inductive circuit takes power from the A.C. line when_________?
A. applied voltage decreases but current increases
B. applied voltage increases but current decreases
C. both applied voltage and current increase
D. both applied voltage and current decrease
The ratio of active power to apparent power is known as factor__________?
A. demand
B. load
C. power
D. form
The best place to install a capacitor is___________?
A. very near to inductive load
B. across the terminals of the inductive load
C. far away from the inductive load
D. any where
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
A. will change the maximum value of current at resonance
B. will change the resonance frequency
C. will change the impedance at resonance frequency
D. will increase the selectivity of the circuit
At very low frequencies a series R-C circuit behaves as almost purely___________?
A. resistive
B. inductive
C. capacitive
D. none of the above
The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces__________?
A. the more heat than produced by A.C. when flowing through the same circuit
B. the same heat as produced by A.C. when flowing through the same circuit
C. the less heat than produced by A.C. flowing through the same circuit
D. none of the above
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