Assertion : No power loss is associated with | vedclass

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(C) In an $AC$ circuit with a pure capacitor,the phase difference between voltage and current is $\phi = -\pi/2$.The average power consumed is given b

Vedclass · Accepted Answer

If the Assertion is correct but Reason is incorrect.

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(C) In an $AC$ circuit with a pure capacitor,the phase difference between voltage and current is $\phi = -\pi/2$.The average power consumed is given by $P_{av} = E_v I_v \cos(\phi)$.Substituting the value of $\phi$,we get $P_{av} = E_v I_v \cos(-\pi/2) = E_v I_v (0) = 0$.Thus,there is no power loss in a pure capacitor circuit.However,the Reason states that no current is flowing in the circuit,which is incorrect because an alternating current $(AC)$ does flow through the capacitor due to its capacitive reactance $X_C = 1/(2\pi f C)$.Therefore,the Assertion is correct,but the Reason is incorrect.

Assertion : No power loss is associated with a pure capacitor in an $AC$ circuit.
Reason : No current is flowing in this circuit.

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Assertion : No power loss is associated with a pure capacitor in an $AC$ circuit.Reason : No current is flowing in this circuit.