1. The problem statement, all variables and given/known data Image 2. Relevant equations KCL DRIVEN RL CIRCUIT 3. The attempt at a solution I got the right answer after trying a different tactic, but I don't understand why it is done this way. My first approach: KCL: 100/45 + 60/2 = iL for t < 0 32.22 - (100/45)e^(-45*(0.00001)/0.5) = 29.999 A (NOT THE RIGHT ANSWER) Second approach: 30 - (100/45)e^(-45*(0.00001)/0.5) = 27.78 A Why is the initial current 30 A? I know how they got it, but why didn't they use KCL? I mean what is happening to the 100 V source?