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The magnetic potential energy stored in ...

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance

A

1.389 H

B

138.88 H

C

0.138 H

D

13.89 H

Text Solution

Verified by Experts

The correct Answer is:
D
Energy stored in the inductor,
`U=(1)/(2)Li^(2)`
or, `25xx10^(-3)=(1)/(2)xxLxx(60xx10^(-3))^(2)`
or, `L=(2xx25xx10^(-3))/((60xx10^(-3))^(2))`
or, `L=13.888~=13.89H`
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