Question 5.67: An inductor of 20 mH is required to store an energy of 2.5 J...
An inductor of 20 mH is required to store an energy of 2.5 J. Determine the current that must be applied to the inductor.
W = 0.5 LI² and hence:
\begin{aligned}I &=\sqrt{\frac{W}{0.5 \times L}}=\sqrt{\frac{25}{0.5 \times 20 \times 10^{-3}}} \\&=\sqrt{2.5 \times 10^2}=15.8 \ A\end{aligned}
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