Electrical Engineering MCQs

Page No. 115

For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?


aInductive


bResistive


cCapacitive


dNone of the above


View Answer Inductive

In the above question, what are the values of cut-off frequencies?


a140 kHz , 60 kHz


b 1020 kHz , 980 kHz


c1030 kHz , 970 kHz


d None of the above


View Answer 1020 kHz , 980 kHz

At parallel resonance, the phase angle between the applied voltage and circuit current is _____________?


a90o


b180o


c0o


dNone of the above


View Answer 0o

At parallel resonance, the ratio L/C is ______________?


aVery large


bZero


c Small


dNone of the above


View Answer Very large

If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?


aIs decreased


bIs increased


c Remains the same


dNone of the above


View Answer Is increased

At series resonance, the net reactive component of circuit current is _______________?


aZero


bInductive


cCapacitive


dNone of the above


View Answer Zero

At series or parallel resonance, the circuit power factor is ________________?


a 0


b5


c1


d8


View Answer 1

At series or parallel resonance, the circuit behaves as a ______________ load?


aCapacitive


b Resistive


c Inductive


dNone of the above


View Answer Resistive

If the resistance of a tuned circuit is increased, the Q of the circuit _______________?


a Is increased


bIs decreased


cRemains the same


dNone of the above


View Answer Is decreased

At series resonance, the phase angle between applied voltage and circuit is______________?


a90o


b180o


c 0o


dNone of the above


View Answer 0o

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