The magnetic energy stored in an inductor of inductance 4H carrying a current of 2 A is [2023]

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Solution

Q.
The magnetic energy stored in an inductor of inductance 4 μH carrying a current of 2 A is [2023]

1 8 mJ

2 8 μJ

3 4 μJ

4 4 mJ

Ans.
(2)

As, $U = \frac{1}{2} L I^{2} = \frac{1}{2} \times 4 \times 10^{- 6} \times 2 \times 2; U = 8 μ J$

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