题目内容
空间有一沿x轴对称分布的电场,其电场强度E随x变化的图象如图所示,下列说法中正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242147340613898.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242147340613898.jpg)
A.O点的电势最低 |
B.![]() |
C.![]() ![]() |
D.![]() ![]() |
C
试题分析:电势高低与场强大小无必然联系.O点场强为0,电势不一定最低,A错.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824214735122331.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824214736074300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824214736822315.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824214736074300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824214738648331.png)
故选C
点评:作出电场线如图,根据顺着电场线,电势降低和对称性可判断电势高低.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.O点的电势最低 |
B.![]() |
C.![]() ![]() |
D.![]() ![]() |