The stored energy in an inductor:
A)depends, in sign, upon the direction of the current
B)depends on the rate of change of current
C)is proportional to the square of the inductance
D)has units J/H
E)is none of the above

Question

Quizplus · Accepted Answer

The stored energy in an inductor is actually proportional to the square of the current flowing through it and the inductance (E = 1/2 L I^2), and it has units of joules (J), not J/H. The energy does not depend on the sign of the current or directly on the rate of change of current, although the rate of change of current affects the voltage across the inductor.

The Stored Energy in an Inductor