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प्रश्न
In a circuit where current lags voltage, which ratio gives the power factor?
पर्याय
\[\cos\phi=\frac{I_p}{R}\]
\[\cos\phi=\frac{I_q}{I_p}\]
\[\cos\phi=\frac{R}{Z}\]
\[\cos\phi=\frac{Z}{R}\]
MCQ
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उत्तर
The power factor is \[R/Z\]. Making the impedance \[Z\] tend toward the resistance \[R\] improves the power factor toward one.
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