Q 12-06-022NEETJEE MainEasy
The current through an inductor is doubled. The energy stored in its magnetic field becomes
Answer: (D) $4$ times
Concept. $U = \dfrac12LI^2 \propto I^2$.
Step 1. Double $I$. $U \to 4U$.
Answer. $4$ times (Option D).
Solution by Sreeraj P, M.Sc Physics