A parallel-plate capacitor is charged and then is disconnected from the battery. By what factor does the stored energy change when the plate separation is then doubled?（ ）
A、Itbecomesfourtimeslarger.
B、Itbecomestwotimeslarger.
C、Itstaysthesame.
D、Itbecomesone-halfaslarge.
E、Itbecomesone-fourthaslarge.
发布时间：2025-11-27 12:41:30
