题目内容
在S点的电量为
质量为
的静止带电粒子被加速电压U,柜间距离为
的匀强电场加速后,从正中央垂直射入板间距离和板长度均为L,电压为U的匀强偏转电场偏转后,立即进入一个垂直纸面方面的匀强磁场,其磁感应强度为B,若不计重力影响,欲使带电粒子通过某距径返回S点,求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317078384763.jpg)
小题1:匀强磁场的宽度D至少多少?
小题2:该带电粒子周期T是多少?偏转电压正负极多长时间变换一次方向。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131707651310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131707682337.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131707775321.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317078384763.jpg)
小题1:匀强磁场的宽度D至少多少?
小题2:该带电粒子周期T是多少?偏转电压正负极多长时间变换一次方向。
小题1:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317078851147.png)
小题2:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317079311137.png)
速度偏角
偏转量: ![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317080091086.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317080721377.png)
磁场宽度
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317078851147.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317081814963.jpg)
2、周期![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131708197714.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317082281865.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317082431784.png)
偏转电压正负极变换一次的时间
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317079311137.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317079471089.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317080091086.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317080721377.png)
磁场宽度
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317080871233.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317078851147.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317081814963.jpg)
2、周期
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131708197714.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317082281865.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317082431784.png)
偏转电压正负极变换一次的时间
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241317079311137.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目