题目内容
如图是某交流发电机输出的交变电压的图像,根据图像可以判定此交变电压( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241645506352795.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241645506352795.png)
A.频率为5Hz |
B.周期为0.1s |
C.将标有“12V、3W”的灯泡接在此交变电流上,灯泡可以正常发光 |
D.t=0.05s时刻,发电机的线圈刚好转至中性面 |
A
试题分析:从图像中可以看出交流电图像为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824164550822500.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824164551009665.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824164551259623.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241645514461062.png)
故选A
点评:由交变电压的图象读出周期、电压的最大值是基本能力.基本题.
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目