题目内容
三个点电荷电场的电场线分布如图所示,图中a、b两点的场强大小分别为
、
,电势分别为
,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250021029137130.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002102867388.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002102882392.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002102898508.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250021029137130.jpg)
A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |
D
试题分析: 电场线密的地方电场强度大,电场线稀的地方电场强度小,故Ea>Eb;根据电场线与等势线垂直,在b点所在电场线上找到与a点电势相等的,依据沿电场线电势降低,可知φa<φb,故ABC错误,D正确.
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |