题目内容
若将两个电源的U-I关系图像画在同一直角坐标系上,如图所示,由图像可得出正确的结论是 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241519229552373.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241519229552373.jpg)
A.电动势E1=E2,内阻r1<r2 |
B.电动势E1=E2,内阻r1>r2 |
C.发生相同电流变化的情况下,电源1的路端电压变化较大 |
D.发生相同电流变化的情况下,电源2的路端电压变化较大 |
AD
试题分析:U-I图像的斜率表示电阻,与纵坐标的截距表示电源电动势,故
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151923017457.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151923080652.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151923189417.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824151923283551.png)
点评:做本题的关键是知道U-I图像的斜率,纵截距,横截距表示的物理含义
![](http://thumb2018.1010pic.com/images/loading.gif)
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