1. The problem statement, all variables and given/known data http://apcentral.collegeboard.com/apc/public/repository/_ap06_frq_physicsc_em_51784.pdf Please please check out Q2 part (d) on this test 2. Relevant equations 3. The attempt at a solution I understand that before S2 is closed, current through the circuit is zero. As soon as S2 is closed, I don't really understand what happens? I understand that both the currents will be ε/R1+R2 after some time, but I don't get how the capacitor which is completely charged, interacts with the circuit right after S2 is closed. Additionally, please explain how the graphs will be drawn.