1. The problem statement, all variables and given/known data Three capacitors are connected in series across a DC power source that produces a constant potential difference. A fourth capacitor is now added in series with the other three. As a result of adding this capacitor, the total energy stored in the system of capacitors has? (decreased, increase, no change) How would this change if the capacitor was added in parallel? 2. Relevant equations C=Q/V E=1/2qV E=1/2q^2/C 3. The attempt at a solution So adding a capacitor has decreased the capacitance. I think the potential difference increase and the charge decrease the same amount? not sure If it were in parallel the voltage would have to be the same but the charge could be different. The capacitance would increase. I'm unsure of how to go about this? can someone explain what would happen how we know the energy? the answer is decrease and increase respectively.