题目内容
(10分)如图所示电路中,电源的电动势E=10V,内电阻r =1Ω,已知R1 =3Ω,R2 =6Ω,
C = 30μF,试求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517110881186.png)
⑴闭合开关S,待稳定后通过R1的电流.
⑵将开关S断开,这以后流过R1的电量.
C = 30μF,试求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517110881186.png)
⑴闭合开关S,待稳定后通过R1的电流.
⑵将开关S断开,这以后流过R1的电量.
(1)I1=1A (2)1.2×10-4C
试题分析:(1)根据闭合电路欧姆定律
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151711182866.png)
(1)开关断开前,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151711431553.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151711494645.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241517116181291.png)
点评:此类题型含有电容,处理方法是将含有电容部分支路看作断路,然后通过简化电路求解
![](http://thumb2018.1010pic.com/images/loading.gif)
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