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A circuit draws a power of 550 watt from...

A circuit draws a power of 550 watt from a source of 220 volt, `50 Hz`. The power factor of the circuit is 0.8 and the current lags in phase behind the potential difference. To make the power factor of the circuit as 1.0, The capacitance should be connected in series with it is

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A circuit draws a power of 550 W from a 220V-50 Hz source. The power factor of the circuit is 0.8. A current in the circuit lags behind the voltage. Show that a capacitor of about 1/(42pi)times10^-2F will have to be connected in the circuit to bring its power factor to unity.