Chapter 6, Problem 9P

a.

To determine

Derive the expressions for current i as a function of time for the intervals $0\le t\le 25\text{ms},25\text{ms}\le t\le 75\text{ms,}75\text{ms}\le t\le 125\text{ms,}125\text{ms}\le t\le 150\text{ms,}\text{and}150\text{ms}\le t\le \infty$.

b.

To determine

Calculate the current in the inductor when the voltage across the inductor is zero.

c.

To determine

Plot the graph of i versus t for $0\le t\le \infty$.