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Define power factor. On which factors do...

Define power factor. On which factors does power factor depend ?

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The ratio of true power and apparent power (virtual power) in an a.c circuit is called as power factor of the circuit.
Power factor `(cos phi)=(P)/(P_("rms")) " " (because P_("rms")=V_("rms")I_("rms"))`
Power factor depends on r.m.s voltage, r.m.s current and average power (P).
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