Which of the following components of an L-C-R | vedclass

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(B) In an $AC$ circuit,the average power dissipated is given by the formula:$P = V_{rms} I_{rms} \cos \phi$where $\phi$ is the phase difference betwee

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Only $R$

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(B) In an $AC$ circuit,the average power dissipated is given by the formula:$P = V_{rms} I_{rms} \cos \phi$where $\phi$ is the phase difference between voltage and current.For an ideal inductor $(L)$ and an ideal capacitor $(C)$,the phase difference between voltage and current is $90^{\circ}$.Therefore,the power dissipated by $L$ or $C$ is:$P_{L 	ext{ or } C} = V I \cos 90^{\circ} = 0$ (since $\cos 90^{\circ} = 0$).For a resistor $(R)$,the voltage and current are in phase,so the phase difference $\phi = 0^{\circ}$.Thus,the power dissipated by the resistor is $P_R = V I \cos 0^{\circ} = V I$.Hence,only the resistor $(R)$ dissipates energy in an $L-C-R$ circuit.

Which of the following components of an $L-C-R$ circuit,with an $AC$ supply,dissipates energy?

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