﻿ An a.c. circuit having an inductor and a resistor in series draws a power of 560 W from an a.c. source marked 210 V-60 Hz. The power factor of the circuit is 0.8. Calculate the impedance of the circuit and the inductance of the inductor.  : Kaysons Education

# An a.c. Circuit Having An Inductor And A Resistor In Series Draws A Power Of 560 W From An a.c. Source Marked 210 V-60 Hz. The Power Factor Of The Circuit Is 0.8. Calculate The Impedance Of The Circuit And The Inductance Of The Inductor.

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## Question

### Solution

Correct option is

The average power over a complete cycle is given by

.

The impedance of the circuit is

The power is consumed in R only. Therefore

Now, the impedance of an L-R circuit is

.

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