题目内容
如图所示,M为理想变压器,各电表均可视为理想电表.电路输入端a、b接正弦交流电压,则在滑动变阻器的滑片P向下滑动的过程中( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250048217595254.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250048217595254.jpg)
A.A1的示数不变,A2的示数增大 | B.A1的示数增大,A2的示数增大 |
C.V1的示数增大,V2的示数增大 | D.V1的示数不变,V2的示数减小 |
D
试题分析:当滑动变阻器的滑片向下滑动时,滑动变阻器的电阻减小,导致电路的总电阻减小,所以电路中的总电流增大,
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004821790332.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004821805620.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004821790332.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004822055344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004822071361.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004822086373.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004822102327.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004822133354.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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