题目内容
如图所示,用电池对电容器充电,电路b之间接有一灵敏电流表,两极板间有一个电荷q处于静止状态.现将两极板的间距变大,则 ( ) 
2021-07-26
A.电荷将向上加速运动
B.电荷将向下加速运动
C.电流表中将有从a到b的电流
D.电流表中将有从b到a的电流
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