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Electrical Oscillations

The power fac...

Question

The power factor of an $L - R$ circuit is

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zero

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between 0 and 1

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Infinity

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Solution

The correct option is C between 0 and 1
Power factor is defined as
$P F = \frac{R}{Z}$
Since $Z = \sqrt{R^{2} + {(X_{L} - X_{c})}^{2}}$
Therefore
$Z \geq R$
which gives $0 \leq P F \leq 1$

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