题目内容
在如图甲所示的电路中,电源电动势为3.0 V,内阻不计,L1、L2、L3为三个相同规格的小灯泡,这种小灯泡的伏安特性曲线如图乙所示,当开关S闭合后 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029404919037.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029404919037.jpg)
A.通过L1的电流为通过L2的电流的2倍 |
B.L1的电阻为7.5 Ω |
C.L1消耗的电功率为0.75 W |
D.L2消耗的电功率为0.375 W |
C
试题分析:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940507423.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940522313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940600608.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940631712.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940647650.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940663589.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940678667.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940709772.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940725772.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002940741789.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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