题目内容
如图所示,两条足够长的光滑平行金属导轨水平放置,导轨所在的区域有垂直导轨平面的匀强磁场(图中未画出)。两导体棒a、b质量分别为ma、
mb;电阻分别为Ra、Rb(导轨电阻不计),初始时导体棒a、b均垂直于导轨静止放置,某一瞬时给b一个垂直于棒向右的冲量I,使其沿导轨向右运动,待运动稳定后,求:这一过程中导体棒a中产生的焦耳热。![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241139421240.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412411392685.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241139421240.gif)
I="mbvb " mbvb=(ma+mb)v共
Q总=![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241139581008.gif)
Qa=![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241140201047.gif)
Q总=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241139581008.gif)
Qa=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241241140201047.gif)
略
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目