試題詳解

 12. A 3 μF capacitor is connected in series with a 6 μF capacitor. When a 300 V potential difference is applied across this combination, the total energy stored in the two capacitors is ______.
(A) 0.09 J
(B) 0.18 J
(C) 0.27 J
(D) 0.41 J
(E) 0.81 J