Q 12-06-051JEE MainJEE Main 2024 (6 Apr, Shift 2)Easy
In a coil, the current changes from $-2\ \text{A}$ to $+2\ \text{A}$ in $0.2\ \text{s}$ and induces an emf of $0.1\ \text{V}$. The self-inductance of the coil is
Answer: (C) $5\ \text{mH}$
$$L = \frac{\varepsilon}{\Delta I/\Delta t} = \frac{0.1}{4/0.2} = \frac{0.1}{20} = 5\times10^{-3}\ \text{H} = 5\ \text{mH}$$
Solution by Sreeraj P, M.Sc Physics