How much does the energy stored in an inductor change if the current through the inductor is doubled?
A)it is the same
B)it is doubled
C)it is quadrupled
D)it is halved
E)it is quartered

Question

Quizplus · Accepted Answer

The energy stored in an inductor is given by the formula $E = \frac{1}{2}LI^2$, where $E$ is the energy, $L$ is the inductance, and $I$ is the current. If the current is doubled, the energy stored becomes $E = \frac{1}{2}L(2I)^2 = 4 \times \frac{1}{2}LI^2$, which means the energy is quadrupled.

How Much Does the Energy Stored in an Inductor Change