The circuit depicted in Fig. 8.79 contains two independent sources, one of which is only a...

The circuit depicted in Fig. 8.79 contains two independent sources, one of which is only active for t > 0. (a) Obtain an expression for iL(t) valid for all t;(b) calculate iL(t) at t = 10 μs, 20 μs, and 50 μs.