试题与答案

如图所示,电路中电源两端电压不变,R为定值电阻。将滑动变阻器的滑片P置于中点,闭

题型:选择题

题目:

如图所示,电路中电源两端电压不变,R为定值电阻。将滑动变阻器的滑片P置于中点,闭合开关S后,各电表均有示数。现将滑动变阻器的滑片P由中点向左移动,则

A.电流表的示数变大

B.电压表V1的示数变大

C.电压表V2的示数变大

D.电压表V2示数与电流表示数的比值不变

答案:

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