题目内容
如图所示的电路中,电流表A和电压表v均可视为理想电表。现闭合开关S后,将滑动变阻器滑片P向左移动,下列结论正确的是 ( )
2021-07-21
A.电流表A的示数变小,电压表v的示数变大
B.小灯泡L变亮
C.电容器c上电荷量减小
D.电源的总功率变大
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