Question 309: Electromagnetic Induction

Question

The magnetic potential energy stored in a certain inductor is $25 \mathrm{~mJ}$, when the current in the inductor is $50 \mathrm{~mA}$. This inductor is of inductance

Accepted Answer

Magnetic potential energy $\mathrm{U}=\frac{1}{2} \mathrm{LI}^2$
$\begin{aligned}
	herefore \mathrm{L} & =\frac{2 \mathrm{U}}{\mathrm{I}^2}=\frac{2 	imes 25 	imes 10^{-3}}{\left(50 	imes 10^{-3}ight)^2} \
& =20 \mathrm{H}
\end{aligned}$

Answer

2.00 H

Answer

0.20 H

Answer

200 H

Answer

20 H

Electromagnetic Induction

The magnetic potential energy stored in a certain inductor is 25 \mathrm{~mJ}, when the current in the inductor is 50 \mathrm{~mA}. This inductor is of inductance

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