College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 45

Capacitors C 1 = 6.0 F and C 2 = 2.0 F are charged as a parallel combination across a 250-V battery. The capacitors are disconnected from the battery and from each other. They are then connected positive plate to negative plate and negative plate to positive plate. Calculate the resulting charge on each capacitor.