LCR Series Circuit and Resonance NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

LCR Series Circuit and Resonance MCQ Questions


1.
In an LCR series circuit, at resonance, the impedance is equal to:
A.
Minimum
B.
Zero
C.
Equal to resistance
D.
Infinity
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ANSWER :
C. Equal to resistance
2.
The resonance frequency of an LCR circuit is given by:
A.
1/√(LC)
B.
√(L/C)
C.
1/(2Ο€βˆš(LC))
D.
2Ο€βˆš(LC)
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ANSWER :
A. 1/√(LC)
3.
Which of the following statements is true for a series LCR circuit at resonance?

NEET - 2017

A.
Current is minimum
B.
Voltage across inductor is zero
C.
Reactance of inductor and capacitor cancel each other
D.
Power factor is zero
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ANSWER :
C. Reactance of inductor and capacitor cancel each other
4.
At resonance, the current in an LCR circuit is:
A.
Maximum
B.
Minimum
C.
Infinite
D.
Zero
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ANSWER :
A. Maximum
5.
The phase difference between voltage and current at resonance in an LCR circuit is:
A.
Zero
B.
90Β°
C.
45Β°
D.
180Β°
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ANSWER :
A. Zero
6.
For a series LCR circuit at resonance, the power dissipated in the circuit is

NEET - 2020

A.
Maximum
B.
Minimum
C.
Zero
D.
Infinity
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ANSWER :
A. Maximum