What is the magnetic energy stored by a 300 mH inductor with a 2.0 A current going through it?
A) 0.60 J
B) 1.2 J
C) 30 mJ
D) 0.15 J
E) 0.075 J

Question

Quizplus · Accepted Answer

The magnetic energy stored in an inductor is given by the formula $E = \frac{1}{2}LI^2$, where $E$ is the energy in joules, $L$ is the inductance in henries, and $I$ is the current in amperes. Substituting the given values, $E = \frac{1}{2} \times 0.3 \times (2.0)^2 = 0.6$ joules.

What Is the Magnetic Energy Stored by a 300 MH