Question

What is the energy required to build up a current of 1 A in an inductor of
20 mH?

Answer 1

Explanation:

$use \: this \: equation \\ e = \frac{1}{2} li {}^{2} \\ e \: = energy \\ l = 20mh \\ i = 1 \\ therefore \\ \frac{1}{2} \times 20 \times {10}^{ - 3} \times {1}^{2} \\ 10 \times {10}^{ - 3} \\ 0.01$

0.01j