The ratio of apparent power to average power in an $A C$ circuit is equal to :

cos θ

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\frac{1}{cos θ}

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form factor

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\frac{1}{{cos}^{2} θ}

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Solution

The correct option is B $\frac{1}{cos θ}$
Apparent power $= V_{r m s} I_{r m s}$
Average power $= V_{r m s} I_{r m s} cos θ$

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