In an AC series circuit, the instantaneous current is zero when the instantaneous voltage is maximum. Connected to the source may be a

In a pure inductive circuit, the voltage leads the current by a phase difference of 900. Hence, when the instantaneous voltage is maximum, the current is zero and vice versa. Hence, option (A) is correct. (Ans)


In a pure capacitive circuit, the voltage lags behind the current by a phase difference of 900. Hence, when the instantaneous voltage is maximum, the current is zero and vice versa. Hence, option (B) is correct. (Ans)


In case of a combination of an inductor and a capacitor also, the current may lead or lag behind the voltage by 900, depending on whether the voltage across the inductor or capacitor is greater. Hence, when the instantaneous voltage is maximum, the current is zero and vice versa. Hence, option (D) is correct. (Ans)


Option (C) is incorrect because in a pure resistor circuit, the current and voltage are in phase with each other. Hence, when the voltage is maximum, the current is also maximum and vice versa.

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