题目内容
在右图所示的电路中,电源的内阻不能忽略。已知定值电阻R1=10Ω,R2=8Ω。当单刀双掷开关S置于位置1时,理想电压表读数为2V。则当S置于位置2时,电压表读数的可能值为( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041191233123.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041191233123.jpg)
A.1.3V | B.1.6V | C.1.9V | D.2.2V |
C
试题分析:解:由闭合电路欧姆定律可知:当开关置1时,
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119154917.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119170793.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119185852.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119201835.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119216626.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004119232370.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.1.3V | B.1.6V | C.1.9V | D.2.2V |