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Physics · PYQ NEET UG 2018
हिन्दीThe magnetic potential energy stored in a certain inductor is \( 25\text{ mJ} \), when the current in the inductor is \( 60\text{ mA} \). This inductor is of inductance
Correct answer · Option 4
\( 13.89\text{ H} \)
Explanation
Energy \( U = \frac{1}{2} L I^2 \implies L = \frac{2U}{I^2} = \frac{2 \times 25 \times 10^{-3}}{(60 \times 10^{-3})^2} = \frac{50 \times 10^{-3}}{3600 \times 10^{-6}} = \frac{50000}{3600} = 13.888\text{ H} \).
