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  4. The power factor of a series LCR circuit when at resonance is :

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Q. The power factor of a series LCR circuit when at resonance is :

MGIMS WardhaMGIMS Wardha 2005

Solution:

Power factor $ \cos \phi =\frac{R}{Z} $ Where Z= Impedance of the circuit at resonance, $ Z=R $ $ \therefore $ $ \cos \phi =1 $