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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

13.89 H

B

0.138 H

C

1.389 H

D

138.88 H

Text Solution

Verified by Experts

The correct Answer is:
D
P.E=`1/2 LI^2`
`therefore L=(2xxP.E)/I^2`
`=(2xx25xx10^(-3))/(60xx10^(-3))^2`
`=(50xx10^3)/3600`
`=0.013888xx10^3` H
`therefore L approx` 13.89 H
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