1. The problem statement, all variables and given/known data see attachment 2. Relevant equations 3. The attempt at a solution here are the MS points : Capacitor stores charge/charges up (1) (If voltage is constant) capacitor doesn’t discharge (1) I don't understand how the answer makes sense. The question asks how placing a capacitor causes the power source to produce a constant voltage. but how does putting the capacitor there suddenly make the power source decide its voltage?