Assertion :In a series $L C R$ circuit, at resonance condition power consumed by circuit is maximum. Reason: At resonance condition, the effective resistance of circuit is maximum.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
At resonance, the impedance of the circuit is reduced to the minimum of $Z = R Ω$ , by definition, as reactance of inductor and capacitor are equal in magnitude. Hence the current is the circuit is maximum , $(I_{r m s} = \frac{V_{r m s}}{Z} = \frac{V_{r m s}}{R})$ . Therefore the power consumed $(= I_{r m s}^{2} R)$ is maximum during resonance.
Assertion is right but reason is incorrect.

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Assertion :In a series LCR circuit, at resonance condition power consumed by circuit is maximum. Reason: At resonance condition, the effective resistance of circuit is maximum.

Assertion :In a series $L C R$ circuit, at resonance condition power consumed by circuit is maximum. Reason: At resonance condition, the effective resistance of circuit is maximum.