题目内容
(10分)如图所示电路中,U=10V,R1=4Ω,R2=6Ω,C=30μF,电池的内阻可忽略.求:
(1)闭合开关S,求稳定后通过R1的电流;
(2)将开关断开,这以后流过R1的总电量。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041201062296.jpg)
(1)闭合开关S,求稳定后通过R1的电流;
(2)将开关断开,这以后流过R1的总电量。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041201062296.jpg)
(1)1A (2)1.2×10-4C
试题分析:⑴闭合开关S后,
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120137327.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120152361.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120168989.png)
(2)闭合开关S后,电容器两端的电压与
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120152361.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120215973.png)
将开关S断开后,电容器两端的电压与电源的相等,有
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004120230577.png)
流过R1的总电量为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041202621322.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目