题目内容
如图、质量为m,电量为q的带电粒子以初速v0从两平行金属板左侧中央平行于极板飞入匀强电场,两平行金属板两端的电压为U,两板的距离为d, 长度为L,并能从另一端射出,(不计重力)。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025435117240.png)
求:(1)两板间的场强大小。(2)粒子刚射出时的竖直偏移量的大小.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025435117240.png)
求:(1)两板间的场强大小。(2)粒子刚射出时的竖直偏移量的大小.
(1)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543558885.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543542592.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543558885.png)
试题分析:(1)平行板电容器两极板间的电场是匀强电场,由匀强电场中电势差与电场强度关系可得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543542592.png)
加速度
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543589747.png)
在初速度方向有:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002543605465.png)
电场方向有:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025436361231.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目