# The true power consumed in a.c. circuit is 400 W 600 W 220 W 800 W

Given, R = 18 ohm

Z = 33 ohm

Vrms = 220 V

For calculating Power, $P = V_{rms}I_{rms} \cos\phi$

$\cos\phi =\frac{R}{Z}$

$P = \frac{V_{rms}^{2}}{Z}\times \frac{R}{Z} =800W$

option (4) is correct

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