1. The problem statement, all variables and given/known data Find DEQ, circuit for time t>0. 2. Relevant equations Ic= CdVc/dt Vl=LdiL/dt 3. The attempt at a solution At T=inf L Short , C Open IL(inf)=4mA, VL(inf)=0, Ic(inf)=0, Vc(inf)=0 T=0- All at 0 T=0+ L=Open C=Short IL(0+)=0, VL(0+)=0, Ic(0+)=4mA, Vc(0+)=0 20v=L diL/dt + Vc + iL5k I need to make a sub for iL but I feel that I am wrong in my subbing in. iL= Vc/2k + C dVc/dt I keep wanting to just say iL=Vs/5k but I need to account for the transient effect of the cap charging and discharging... it just seems odd not to include R1 in iL since thats how I came up with it in the first place.