题目内容
如图所示,在虚线OOˊ的左侧区域存在磁感应强度为B的匀强磁场,面积为S,匝数为n的矩形线圈abcd放在该匀强磁场中,cd边与磁场边界重合。使线圈以cd边为轴以角速度ω匀速转动,则线圈产生的电动势的有效值为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242241591002052.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242241591002052.png)
A.nBSω | B.![]() | C.![]() | D.![]() |
B
试题分析:根据法拉第电磁感应定律,此交流电的最大值为Em= nBSω,在半个周期内的有效值为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824224202251671.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824224203094871.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824224159958662.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.nBSω | B.![]() | C.![]() | D.![]() |