题目内容
如图所示,P、Q固定放置两等量异种电荷,b、c、O在P、Q的连线上,e、o为两点电荷中垂上的点,且
,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241533524693294.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153352407840.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241533524693294.jpg)
A.a点电势等于b点电势 |
B.b点场强大于e点场强 |
C.电子在a点的电势能大于电子在o点的电势能 |
D.b、c间电势差大于c、o间电势差 |
BD
试题分析:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082415335285916491.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153352906523.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153352984517.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153353047496.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153353125562.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153353187545.png)
点评:此类题型主要考察了关于等量异种电荷电场以及等势线分布,通过电场线的性质,例如疏密,方向等来进行判断。由于题目类型的特殊性,若能记忆住等量异种电荷的电场线分布,对解决本类问题是大大有益的。
![](http://thumb2018.1010pic.com/images/loading.gif)
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