The initial value problem governing the current i following in an RL circuit when a step voltage of magnitude $\in$ is applied to circuit at $t=0$ is given by (R, L, t are constants ) $iR= \large\frac{Ldi}{dt} $$=\in, t > 0, i(0)=0$ Determine limiting value of i as $t \to \infty$

Question

$(a)\;\frac{\in}{R} \\ (b)\;\frac{2 \in}{R} \\ (c)\;e^{-\frac{RE}{L}} \\ (d)\;e^{\frac{R}{L}} $