题目内容
用电压表、电流表分别测定a、b两节干电池的电动势
、
和内电阻
、
时,画出的图线如图所示,则由此图线可知( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250020485462589.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002048468388.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002048483392.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002048499328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002048515329.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250020485462589.jpg)
A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |
A
试题分析:由图线可知,a交电压轴于更大的位置处,故a的电动势大于b,C、D均不对;又因为它们的短路电流相等,根据内阻的计算公式可得,a电源的内阻大于b电源的内阻,A是正确的。
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |