1. The problem statement, all variables and given/known data A circuit is connected to charge a capacitor. The switch in the circuit is initially open, then closed at t = 0. As t --> infinity, what is the voltage across the capacitor? When does it reach 60 % of this limiting voltage? 2. Relevant equations Not sure - maybe q = qf (1-e-t/RC) 3. The attempt at a solution I think as t --> infinity, the voltage across the capacitor will be equal to the emf of the battery. But I don't know what limiting voltage is, or how you find it. The only equation I could find involving time is the one above, but I'm not sure if or how that applies to this question.