In an AC circuit consisting of a resistor and capacitor in series with each other,the sum of the peak voltages across the resistor and across the capacitor must add up to the emf of the AC source.

Question

Quizplus · Accepted Answer

In an AC circuit, the voltages across the resistor and capacitor are out of phase, so their peak voltages do not simply add up to the peak voltage of the source. Instead, they must be added vectorially, considering their phase difference.

In an AC Circuit Consisting of a Resistor and Capacitor