I hope people don't mind me asking all these questions. The problem is the first image below. I have transformed the original circuit with SW1 closed to a Norton equivalent. Hopefully correctly. See below. I have the formula from my notes for this sort of circuit; i(t)-I=(i(0)-I)e^(-t/GL) and I have L=10, G=1/20, I=2 for the general formula. How do I get i(0)? I think it must be very simple, i just can't see how.