题目内容
有两个电阻R1=2Ω R2=3Ω,则有 ( )
A.R1,R2串联总电阻为5Ω | B.R1,R2并联总电阻为1Ω |
C.R1,R2串联总电阻为2.5Ω | D.R1,R2并联总电阻为1.2Ω |
AD
试题分析:串联电路总电阻等于各部分电阻之和,即
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152106492725.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152106633976.png)
故选AD
点评:(1)串联电路的等效总电阻为各电阻值之和,即
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152106851655.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824152106992822.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目