【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
如图所示,两带电平行板竖直放置,开始时两板间电压为U,相距为d,两板间形成匀强电场.有一带电粒子质量为m(重力不计)、所带电量为+q,从两板下端连线的中点P以竖直速度v0射入匀强电场中,要使得带电粒子落在A板M点上,试求:(1)此过程中电场力做的功(2)M点离板下端的高度(3)若将A板向左侧水平移动d/2,此带电粒子仍从P点以速度v0竖直射入匀强电场,则两板间电压应增大还是减小?电压应变为原来的几倍?(4)若将A板向左侧水平移动d/2时两板电压保持为U,则此带电粒子应以多大的速度v′从P点竖直射入匀强电场?
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参考答案:
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