# Calculating the average power available with an AC source

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The circuit of a resistor and a capacitor in series with an AC source that supplies an rms voltage of 240V. At the frequency of the source the reactance of the capacitor is 50.0 ohms. The rms current in the circuit is 3.0A. What is the average power supplied by the source?

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In a circuit consisting of a resistance and a capacitive reactance in series, the voltage and current will have a relative phase angle between 0Â° and 90Â°, depending on the ratio of resistance to ...

#### Solution Summary

This solution calculates the average power available from an AC source given voltage, current and frequency.

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