题目内容
如图所示为甲、乙两灯泡的I一U图象.根据图象,计算甲、乙两灯泡并联在电压为220V的电路中,实际发光的功率约为 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412335760932570.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412335760932570.png)
A.15W、30W | B.30W、40W |
C.40W、60W | D.60W、100W |
C
本题考查图像。由图像知,当电压为
时,
,
,
,
,选C。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123357656574.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123357687615.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123357750613.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123357765775.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123357796796.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.15W、30W | B.30W、40W |
C.40W、60W | D.60W、100W |