选择题 适中0.65 引用1 组卷12
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如图,电源电压保持不变,表①、②、③是电流表或电压表,滑动变阻器R2的滑片P在中点,闭合开关S,三只电表均有示数。当滑片P向左移动时,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/6/17/2486566012084224/2486895891963904/STEM/69cbe54b-6b59-4a17-861d-b8caa4e7dab2.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2020/6/17/2486566012084224/2486895891963904/STEM/69cbe54b-6b59-4a17-861d-b8caa4e7dab2.png?resizew=156)
A.若电阻串联,则①、③是电压表,表②示数变小 |
B.若电阻并联,则①、③是电流表,表①示数变小 |
C.若电阻串联,则①、③是电压表,表①示数变小 |
D.若电阻并联,则①、③是电流表,表②示数变大 |
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