题目内容
两电阻R1、R2的电流I和电压U的关系如图所示,可知两电阻R1:R2等于( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102157438812970.png)
A.1:3 | B.3:1 | C.1:
| D.
|
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102157438812970.png)
由图可知,R1=
;R2=
;
故R1:R2=tan30°:tan60°=1:3;
故选:A.
1 |
tan60° |
1 |
tan30° |
故R1:R2=tan30°:tan60°=1:3;
故选:A.
![](http://thumb2018.1010pic.com/images/loading.gif)
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