In a simple series AC circuit, an explanation for the phase relationship between current and voltage for a capacitor is that the voltage across a capacitor is proportional to
A) the current.
B) the time integral of the current.
C) the time derivative of the current.
D) none of the above.

Question

Quizplus · Accepted Answer

In a capacitor, the voltage across it is proportional to the time integral of the current flowing through it. This relationship is described by the equation V = (1/C) ∫ i(t) dt, where V is the voltage, C is the capacitance, and i(t) is the current as a function of time. This integral relationship results in the voltage lagging the current by 90 degrees in phase in an AC circuit.

In a Simple Series AC Circuit, an Explanation for the Phase