题目内容
有一带电量
的点电荷,从电场中的A点移到B点时,克服电场力做功
,从B点移到C点时电场力做功
。问:
(1)AB、BC、CA间电势差各为多少?
(2)如以B点为零电热,则A、C两点的电势各为多少?
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135511963683.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512009540.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512056538.png)
(1)AB、BC、CA间电势差各为多少?
(2)如以B点为零电热,则A、C两点的电势各为多少?
(1)
,![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512181645.png)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512259923.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512477634.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512119672.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512181645.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512228684.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512259923.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512477634.png)
(1)
求得三个电势差为
,
,
(2)如以B点为零电热,
,同理可求得![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512477634.png)
本题考查公式
应用,和电势差
的应用
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512555834.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512119672.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512228684.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512181645.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512259923.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512477634.png)
本题考查公式
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135512555834.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135513242639.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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