Doubling the potential across a given capacitor causes the energy stored in that capacitor to
A) reduce to one-fourth.
B) quadruple.
C) reduce to one-half.
D) double.

Question

Quizplus · Accepted Answer

The energy stored in a capacitor is given by the formula $E = \frac{1}{2}CV^2$, where $E$ is the energy, $C$ is the capacitance, and $V$ is the potential difference across the capacitor. Doubling the potential ($V$) results in the energy ($E$) being quadrupled, since the potential difference is squared in the formula.

Doubling the Potential Across a Given Capacitor Causes the Energy