题目内容
下图甲为小型旋转电枢式交流发电机的原理图,其矩形线圈在磁感应强度为B的匀强磁场中,绕垂直于磁场方向的固定轴
,匀速转动,线圈的两端经集流环和电刷与电阻
连接,与电阻
并联的交流电压表为理想电表,示数是10V。图乙是穿过矩形线圈磁通量
随时间t变化的图像,线圈电阻忽略不计,则下列说法正确的是:( )
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/2014082500062555219540.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625459363.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625490500.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625505303.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625537345.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/2014082500062555219540.png)
A.电阻![]() |
B.0.02s时![]() |
C.![]() ![]() ![]() ![]() |
D.通过![]() ![]() ![]() ![]() |
AC
试题分析:根据公式
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625880590.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625911526.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625927855.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625942794.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625973299.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625989269.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625786955.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000626005850.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000626020251.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000625989269.png)
![](http://thumb.zyjl.cn/pic2/upload/papers/20140825/20140825000626067899.png)
![](http://thumb.zyjl.cn/images/loading.gif)
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