Assertion : In series LCR circuit, the resonance occurs at one frequency only. Reason : At resonance the inductive reactance is equal and opposite to the capacitive reactance.
A
A,R are true and R is the correct reason for A
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B
A,R are true and R is not the correct reason for A
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C
A is true, R is false
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D
A is false, R is true
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Solution
The correct option is B A,R are true and R is the correct reason for A Resonance frequency w=1√LC
ZC=ZL
1wc=wL
for a particular set of conductor and capacitor there is only one value of frequency
i.e. w=1√LC
Hence both Assertion and Reason are true and Reason is the correct explanation for Assertion.