Alternating CurrentHard

Question

In a series LCR circuit R = 200 Ω and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30o. On taking out the inductor from the circuit the current leads the voltage by 30o. The power dissipated in the LCR circuit is

Options

A.305 W
B.210 W
C.Zero W
D.242 W

Solution

The given circuit is under resonance as XL = XC
Hence power dissipated in the circuit is
= 242 W

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