题目内容
如图为一匀强电场,某带电粒子从A点运动到B点,在这一运动过程中克服重力做的功为2.0J,电场力做的功为1.5J,则下列说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250008125842310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250008125842310.png)
A.粒子带负电 |
B.粒子在A点的电势能比在B点少1.5J |
C.粒子在A点的动能比在B点少0.5J |
D.粒子在A点的机械能比在B点少1.5J |
D
试题分析:根据粒子的运动轨迹,可知粒子带正电;根据电场力做功和电势能的关系
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000812600770.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000812615709.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000812646876.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000812662730.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目