Physics - EMI/AC Question with Solution | TestHub

The energy stored in an inductor is given by the formula

$U=\frac{1}{2}L{i}^2$

Given,$U=0.1\mathrm{ J}, i=0.2 \mathrm{A}$

$0.1=\frac{1}{2}L\times {\left(0.2\right)}^2$

$\Rightarrow L=\frac{2\times 0.1}{{\left(0.2\right)}^2}=\frac{0.2}{0.2\times 0.2}$

$=\frac{10}{2}=5 \mathrm{H}$