1. The problem statement, all variables and given/known data Find the expression of the current "i" by terms of time. The answer is 3e^(20t) Amps 2. Relevant equations i(t)=I_final+(I_initial-I_final)*e^(-t/τ) 3. The attempt at a solution I have found the initial current as 3 amps. However, after the switch had been changed for too long, I m not sure about the way how the inductor behaves. Will it be a short circuit? If so, there is some problem about the loop on the right, like 8ix-6ix=0 Can the dependant source behave like that? Also I have problem about finding the time constant, I find 1/τ as 60. Thanks for your help!!!