题目内容
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351336459.gif)
(1)微粒从A到P所经历的时间和加速度的大小;
由A至Q的运动轨迹;
(3)电场强度E和磁感强度B的大小.
(1)0.05s
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351414459.gif)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351430630.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241153514455108.jpg)
(3)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351461572.gif)
(1)微粒从平行
轴正方向射入电场区域,由A到P做类平抛运动,微粒沿
轴方向做匀速直线运动
(2分)
微粒沿
轴方向做初速度为零的
匀加速直线运动
m/s2 (3分)
(2)
(3分)
轨迹如图 (2分)
(3)
(2分)
设微粒从P点进入磁场以速度
做匀速圆周运动
(1分)
由
得
(1分)
有几何关系
(2分)
T (2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351477187.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351477187.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351539397.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351555570.gif)
微粒沿
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351664193.gif)
匀加速直线运动
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351679464.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351414459.gif)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351711371.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351726476.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351430630.gif)
轨迹如图 (2分)
(3)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351757429.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351773473.gif)
设微粒从P点进入磁场以速度
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351804185.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351820301.gif)
由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351867540.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351882489.gif)
有几何关系
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351882283.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115351461572.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目