A 7.7-μF capacitor is charged by a 125-V battery (Fig. 17-29a) and then is disconnected from the

Question:

A 7.7-μF capacitor is charged by a 125-V battery (Fig. 17-29a) and then is disconnected from the battery. When this capacitor (C1) is then connected (Fig. 17-29b) to a second (initially uncharged) capacitor, C2, the final voltage on each capacitor is 15V, what is the value of C2?