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The power fac...

Question

The power factor of LCR circuit at resonance is -

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Solution

At resonance, inductive impedance is equal to Capacitive impedance.
$X_{L} = X_{c}$
Hence, the voltage across inductor and capacitor cancel each other.
The total impedance of the circuit is only due to resistor.
The phase angle between voltage and current is zero.
The power factor is unity.

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