[填空题]
A capacitor is charz68 wwn)lxb 5yged by a 125-V battery (Fig. 17–29a)ii3 a.m bh1hn yv:/a9x(ki8vy and then is disconnected from the b v 9/x8(:yi imaivkh3b n1ha.yattery. When this capacitor $(C_1)$ is then connected (Fig. 17–29b) to a second (initially uncharged) capacitor, $C_2$, the final voltage on each capacitor is 15 V. What is the value of $C_2$? [Hint: charge is conserved.] $ \times10^{ -5}\,F$
