题目内容
一天然放射性物质射出三种射线,经过一个匀强电场和匀强磁场共存的区域(方向如图所示),调整电场强度E和磁感强度B的大小,使得在MN上只有两个点受到射线照射。下面的哪种判断是正确的
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241143537773636.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241143537773636.jpg)
A.射到b点的一定是![]() |
B.射到b点的一定是![]() |
C.射到b点的一定是![]() ![]() |
D.射到b点的一定是![]() |
C
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353855191.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353793201.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353902495.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353808217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353996372.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114354011536.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353808217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353808217.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114354058512.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114354074266.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114354089507.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114353793201.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.射到b点的一定是![]() |
B.射到b点的一定是![]() |
C.射到b点的一定是![]() ![]() |
D.射到b点的一定是![]() |