The energy stored in an inductor is given by:

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

An inductor with a 2.0 A current stores energy.

At what current will the stored energy be twice as large?

Express your answer to two significant figures and include the appropriate units. (If=?)

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