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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