Energy stored in the inductor:

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

From the equation, U is directly proportional to i^{2}

U_{2}/U_{1} = (i_{2}/i_{1})^{2}

If the current is doubled:

i_{2} = 2i_{1}

If the current in an inductor is doubled, by what factor is the stored energy multiplied?

a. 1

b. 1/2

c. 1/4

d. 2

e. 4

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