题目内容
如图所示,平行板电容器与恒压电源连接,电子以速度
垂直于电场线方向射入并穿过平行板间的电场,若仅使电容器上极板上移,设电容器极板上所带电荷量Q,电子穿出平行板时的在垂直于板面方向偏移的距离
,以下说法正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314547653.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314501325.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314532310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314547653.png)
A.Q减小,![]() | B.Q减小,![]() | C.Q增大,![]() | D.Q增大,![]() |
B
试题分析:若仅使电容器上极板上移,则两极板间距d变大,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314657742.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314688536.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314703595.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314719753.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314532310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004314750543.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.Q减小,![]() | B.Q减小,![]() | C.Q增大,![]() | D.Q增大,![]() |