alleryThe energy stored in an inductor of inductance $L$ carrying current $I$ is:
A$L I$
B$L I^2$
C$\tfrac{1}{2} L^2 I$
D$\tfrac{1}{2} L I^2$
Answer & Solution
Correct answer: D. $\tfrac{1}{2} L I^2$
Energy in an inductor $U_B = \tfrac{1}{2} L I^2$, analogous to kinetic energy $\tfrac{1}{2}mv^2$ (L plays the role of mass/inertia for current).
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