Question:
An inductor-coil of inductance $20 \mathrm{mH}$ having resistance $10 \Omega$ is joined to an ideal battery of emf $5.0 \mathrm{~V}$. Find the rate of change of the induced emf at
(a) $t=0$,
(b) $t=10 \mathrm{~ms}$, and
(c) $t=1.0 \mathrm{~s}$.
Solution:
