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

Create a free account to view solution

View Solution Free
Topic: Alternating Current·Practice all Alternating Current questions

More Alternating Current Questions

In an a.c. circuit consisting of resistance R and inductance L, the voltage across R is 60 volt and that across L is 80 ...With increase in frequency of an AC supply, the inductive reactance :...The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gaug...An alternating EMF of frequency is applied to a series LCR circuit. For this frequency of the applied EMF,...The current in a circuit containing a capacitance C and a resistance R in series leads over the applied voltage of frequ...