题目内容
如图,有四个虚线框围成的正方形,A、B分别表示两个电阻RA、RB的U-I图线,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241246412461045.png)
A.RA=4RB
B.A、B并联后总电阻的U-I图线是C
C.当A、B中的电流相等时,UA=4UB
D.当A、B中的电压相等时,IB=4IA
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241246412461045.png)
A.RA=4RB
B.A、B并联后总电阻的U-I图线是C
C.当A、B中的电流相等时,UA=4UB
D.当A、B中的电压相等时,IB=4IA
ACD
图像斜率表示电阻,由斜率知
,A对。当A、B中的电流相等时,由
知,
,C对。当A、B中的电压相等时,由
知,
,D对。A、B并联后总电阻小于AB任何一个电阻,图像斜率B,B错。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124641277555.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124641309452.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124641324555.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124641355509.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124641558513.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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