In a simple series RC circuit with a sinusoidal driving voltage, the phase relationship for a capacitor is that the
A) current leads the voltage by 90°.
B) voltage leads the current by 90°.
C) Either response might be correct, depending on further details.
D) The voltage and current are in phase.

Question

Quizplus · Accepted Answer

In a simple series RC circuit with a sinusoidal driving voltage, the current leads the voltage across the capacitor by 90°. This is because the capacitor's charging and discharging behavior causes the current to reach its maximum before the voltage does.

In a Simple Series RC Circuit with a Sinusoidal Driving