如图所示, C 1 和 C 2 两空气电容器串联以后接电源充电.在电源保持联 接的情况下,在 C 2 中插入一电介质板,则
A.
C1极板上的电荷增加, C 2 极板上的电荷增加
B.
C1极板上的电荷减少, C 2 极板上的电荷增加
C.
C1极板上的电荷增加, C 2 极板上的电荷减少
D.
C1极板上的电荷减少, C 2 极板上的电荷减少
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