In a capacitor in an AC circuit,the voltage:
A)leads the current by 90°.
B)lags the current by 90°.
C)may lead or lag the current depending on the frequency.
D)is in phase with 70.7% of the current.

Question

Quizplus · Accepted Answer

In a capacitor, the current leads the voltage by 90°, which means that the voltage lags the current by 90°. This is true for all frequencies, unlike choice C which suggests that the phase relationship depends on frequency. Choice D is incorrect as 70.7% phase shift is only true for a specific type of circuit (RC circuit) and not universally applicable.

In a Capacitor in an AC Circuit,the Voltage