题目内容
(12分)如图,两平行金属板A、B间为一匀强电场,A、B相距6cm,C、D为电场中的两点,且CD=4cm,CD连线和场强方向成60°角.已知电子从D点移到C点电场力做3.2×10-17J的功,求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250017006761949.jpg)
(1)匀强电场的场强大小;
(2)A、B两点间的电势差;
(3)若A板接地,D点电势为多少?(电子带电量e=
)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250017006761949.jpg)
(1)匀强电场的场强大小;
(2)A、B两点间的电势差;
(3)若A板接地,D点电势为多少?(电子带电量e=
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700832646.png)
(1)
(2)
(3) ![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700895635.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250017008481209.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700879893.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700895635.png)
试题分析:(1)平行金属板之间为匀强电场,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700926597.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700941689.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700957191.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700973691.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700988684.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701051593.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250017008481209.png)
(2)由
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701051593.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700879893.png)
(3)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701175630.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701191676.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701207548.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001700895635.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001701051593.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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