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Standard XII

Physics

Power Factor

In a series L...

Question

In a series LCR circuit $R = 200 O m e g a$ and the voltage and the frequency of the main supply is $220$ $V$ and $50$ $H z$ respectively. On taking out the capacitance from the circuit the current lags behind the voltage by $30^{0}$ . On taking out the inductor from the circuit the current leads the voltage by $30^{0}$ . The power dissipated in the LCR circuit is

305

W

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210

W

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Z e r o W

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242

W

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Solution

The correct option is D $242$ $W$
The given circuit is under resonance as $X_{L} = X_{C}$
Hence power dissipated in the circuit is $\frac{V^{2}}{R}$
$P = 242 W$

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The correct option is D 242 WThe given circuit is under resonance as XL=XCHence power dissipated in the circuit is V2RP=242W

The correct option is D $242$ $W$
The given circuit is under resonance as $X_{L} = X_{C}$
Hence power dissipated in the circuit is $\frac{V^{2}}{R}$
$P = 242 W$