题目内容
长为L的导线ab斜放(夹角为θ)在水平轨道上,轨道平行间距为d,通过ab的电流强度为I,匀强磁场的磁感应强度为B,如图所示,则导线ab所受安培力的大小为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241236143904940.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241236143904940.png)
A.IdB/cosθ | B.IdB/sinθ | C.ILBsinθ | D.ILB |
BD
电流垂直于磁场放置,所以安培力的大小为
,所以BD正确
故选BD
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123614406916.png)
故选BD
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.IdB/cosθ | B.IdB/sinθ | C.ILBsinθ | D.ILB |