1. The problem statement, all variables and given/known data (a) What is the potential of point a with respect to point b in Fig. 26.61 (V = 16.0 V, R1 = 7.00 , R2 = 4.00 ) when switch S is open? (b) Which point, a or b, is at the higher potential? (c) What is the final potential of point b with respect to ground when switch S is closed? (d) How much does the charge on each capacitor change when S is closed? 2. Relevant equations C=q/V, V=IR, Req=R1+R2 3. The attempt at a solution I'm having trouble getting started on this one. I understand capacitors in a circuit, and I understand resistors in a circuit. I also understand RC circuits for the most part. Where I seem to get lost is when there are multiple capacitors with resistors. As for an attempt at the answer... a/b) I know that when the capacitors are fully charged there will be no current flowing. Is this the case at points a and b? If there is no current then V=IR at point b will be 0? Same at point a? If so, how can one be at a higher potential than the other? If not, then I'm not sure how to start part a. c) When the switch is closed, then the V source will have a direct route to ground through R1 and R2. Potential at point b is 16V? d) The capacitors would then discharge through the ground. So I assume the change of charge would be equal to the total charge of each capacitor. Q=CV the total charge would be Q1=C1(16V) and Q2=C2(16V). Any help would be much appreciated!