题目内容
某电场的电场线如图所示,电场中M、N两点的场强大小分别为
和
,由图可知
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241635128121927.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824163512485432.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824163512641398.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241635128121927.jpg)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.无法比较![]() ![]() |
C
试题分析:电场线密的地方电场的强度大,电场线疏的地方电场的强度小,所以
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824163514294597.png)
故选C.
点评: 电场线是从正电荷或者无穷远出发出,到负电荷或无穷远处为止,电场线密的地方电场的强度大,电场线疏的地方电场的强度小.
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.无法比较![]() ![]() |