What will be the stored energy by a 100 mH inductor when 1 A current is flowing through it?

Correct option is D

$$\text{The formula for the stored energy in an inductor is given by:} \\[4pt]E = \frac{1}{2} L I^2 \\[8pt]\text{Where:} \\[4pt]\bullet \; E \text{ is the stored energy in joules,} \\[4pt]\bullet \; L \text{ is the inductance in henries,} \\[4pt]\bullet \; I \text{ is the current in amperes.} \\[8pt]\text{Given:} \\[4pt]\bullet \; L = 100\,\text{mH} = 100 \times 10^{-3}\,\text{H,} \\[4pt]\bullet \; I = 1\,\text{A.} \\[8pt]E = \frac{1}{2} \times (100 \times 10^{-3}) \times (1)^2 \\[4pt]E = 0.05\,\text{J}$$​​