题目内容
如图所示,电源内阻不计,为使电容器的带电量增大,可采取以下那些方法:( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241527325933013.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241527325933013.jpg)
A.增大R1 | B.减小R1 | C.增大R2 | D.增大R3 |
BC
试题分析:直流电路中,电容器相当于断路,电容器两极板间电压等于电阻
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732624349.png)
根据电容的定义式
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732687575.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732780625.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732843575.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732890304.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732624349.png)
故选BC
点评:关键是根据分压式得到电容器两端的电压情况,然后根据电容的定义式确定电量的变化情况;本题中电阻
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152733014348.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152732624349.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.增大R1 | B.减小R1 | C.增大R2 | D.增大R3 |