試題詳解

12. A 7 µF and a 3 µF capacitor are each charged to a potential difference of 100 V. The positive terminal of the 3 µF capacitor is then connected to the negative terminal of the 7 µF capacitor and the negative terminal of the 3 µF capacitor is connected to the positive terminal of 7 µF capacitor. What total energy is now stored on the two-capacitor system? Answer in J.
(A) 0
(B) 1.6 × 10^-2
(C) 8.0 × 10^-3
(D) 4.0 × 10^-2
(E) 5.0 × 10^-2