题目内容
(4分)电阻A,B的伏安曲线如图所示,A,B电阻阻值之比为__________。
两电阻并联后总电阻的伏安曲线在__________内(填“区域I”、“区域II”或“区域III”内)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241534382403416.jpg)
两电阻并联后总电阻的伏安曲线在__________内(填“区域I”、“区域II”或“区域III”内)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241534382403416.jpg)
3:1 ; 区域Ⅲ
试题分析:根据I-U图像可知,图像的斜率的倒数即为电阻大小,所以A的电阻为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153438271608.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153438365521.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153438599603.png)
点评:此类题型考察了对I-U图像的理解。
![](http://thumb2018.1010pic.com/images/loading.gif)
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