题目内容
如图,在光滑水平面上固定一
个小球A,用一根原长为L0由绝缘材料制成的轻弹簧把A球和另一个小球B连接起来.然后让两球带上等量的同种电荷Q,这时弹簧的伸长量为X1,如果设法使AB的电
量各减少一半,这时弹簧的伸长量为X2,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241228001662591.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412280011972.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412280013565.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241228001662591.gif)
A.X2= X1![]() |
B.X2= X1/ 4 |
C.X2>X1/ 4 |
D.X2<X1/ 4 |
C
略
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.X2= X1![]() |
B.X2= X1/ 4 |
C.X2>X1/ 4 |
D.X2<X1/ 4 |