题目内容
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841397310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841397310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841553665.png)
1:2 1:1
试题分析:带电粒子在两平行板间匀强电场中做类平抛运动,由平抛运动的规律计算侧向位移,得到侧向位移之比;由动能定理得到动能的增加量和动能增量之比。
设两平行板长为L,匀强电场场强为E,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841397310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841662465.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841787645.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151841896653.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151842052920.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241518421451006.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241518422231011.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241518423791184.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151842442686.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151842504768.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151842754790.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241518427691450.png)
点评:偏转问题的分析处理方法类似于平抛运动的分析处理,应用运动的合成和分解的方法。沿初速度方向为匀速直线运动,沿电场力方向为初速度为零的匀加速度直线运动。把电场力看做一个普通的力,应用力学规律分析求解,这类问题就显得简单而熟悉。
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目