如图所示电路中,电源电压保持不变,闭合开关S后,将滑动变阻器R2

如图所示电路中,电源电压保持不变,闭合开关S后,将滑动变阻器R2的滑片P向右移动,在此过程中:

A.电流表A示数变大,电压表V2示数变小   B.电流表A示数变大,电压表V1示数变小

C.电压表V1示数变小,电压表V2示数变大   D.电压表V1示数不变,电压表V2示数变大

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