Alternating Current

A coil has an inductance of \(2 \mathrm{H}\) and resistance of \(4 ~\Omega\). A \(10 \mathrm{~V}\) is applied across the coil. The energy stored in the magnetic field after the current has built up to its equilibrium value will be ___________ \(\times 10^{-2} \mathrm{~J}\).