题目内容
如图所示,在光滑绝缘的水平桌面上方固定着电荷量大小相等的两个点电荷
,一个带电小球(可视为点电荷)恰好围绕O点在桌面上做匀速圆周运动。已知O、
在同一竖直线上,下列判断正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047046792315.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004704648443.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004704648443.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047046792315.jpg)
A.圆轨道上的电势处处相等 |
B.圆轨道上的电场强度处处相等 |
C.点电荷![]() |
D.![]() |
ACD
试题分析:根据点电荷电场、电势的特点,圆轨道上的电势处处相等,电场强度的大小处处相等,但方向不同,A对,B错;由于带电小球做匀速圆周运动,所以点电荷
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004704648443.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004704710338.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004704710338.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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