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  • The magnetic potential energy stored in a certain inductor is 25mJ. When the current in the inductor is 60mA. This inductor is of inductance Option: 1</stro

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

Option: 1

0.1389H


Option: 2

13.89H


Option: 3

138.9H


Option: 4

1.389H


Answers (1)

best_answer

Energy stored in the conductor

U=\frac{1}{2} L i^2

\Rightarrow 25 \times 10^{-3}=\frac{1}{2} \times L \times\left(60 \times 10^{-3}\right)^2

\Rightarrow \quad L=\frac{2 \times 25 \times 10^{-3}}{\left(60 \times 10^{-3}\right)^2}

=13.888 \ldots \approx 13.89H

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manish

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