题目内容
如图,在xoy平面内,有场强E=12N/C、方向沿x正方向的匀强电场,磁感强度B=2T、方向垂直xoy平面指向纸里的匀强磁场.一质量m=4×
kg、电量q=2.5×
C的带电微粒沿xoy平面做匀速直线运动,运动到原点O时,撤去磁场,经一段时间后,带电粒子运动到了x轴上P点,求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241158005001483.gif)
(1)PO之间的距离 ; (2)带电微粒由O运动到P点的时间.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115800391123.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115800391123.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241158005001483.gif)
(1)PO之间的距离 ; (2)带电微粒由O运动到P点的时间.
(1)14.15m (2)1.2s
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241158005001533.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241158005313591.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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