题目内容
在暗室的真空装置中做如下实脸:在竖直放置的平行金属板间的匀强电场中,有一个能产生
、
、
三种射线源、从射线 源射出的一束射线垂直于电场方向射入电场,如图所示,在于射线源距离为H高处,水平放置两张叠放着的、涂药面朝下的印像纸(比一般纸厚且坚韧的涂有感光药的纸),经射线照射一段时间后把两张印像纸显形。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147414912783.jpg)
(1)上面的印像纸有几个暗斑?各是什么射线的痕迹?
(2)下面的印像纸显出一串三个暗斑,试估算中间暗斑与两边暗斑的距离之比?
(3)若在此空间再加上与电场方向垂直的匀强磁场,一次使
射线不偏转,一次使
射线不偏转,则两次所加匀强磁场的磁感应强度之比是多少?(已知:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741538343.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741553227.gif)
)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741444201.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741460217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741475191.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147414912783.jpg)
(1)上面的印像纸有几个暗斑?各是什么射线的痕迹?
(2)下面的印像纸显出一串三个暗斑,试估算中间暗斑与两边暗斑的距离之比?
(3)若在此空间再加上与电场方向垂直的匀强磁场,一次使
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741444201.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741460217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741538343.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741553227.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741584774.gif)
(1)2个暗斑,分别是
、
射线痕迹 (2)5:84 (3)10:1
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741460217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741475191.gif)
(1)2个暗斑,分别是
、
射线痕迹,因这两处射线穿透性强
(2)由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741678501.gif)
(3) 由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741709638.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741460217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741475191.gif)
(2)由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741662821.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741678501.gif)
(3) 由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741694450.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114741709638.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目