题目内容
下列关于电场强度的说法中,正确的是( )
A.公式![]() |
B.由公式![]() |
C.在公式![]() ![]() ![]() |
D.由公式![]() |
C
试题分析:公式
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003105090561.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003105121771.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003105090561.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003105168674.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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