题目内容
如图,线圈abcd的ad长20cm,ab长10cm,匝数N=50匝,电阻不计,在磁感应强度B=
T的匀强磁场中绕OO1轴匀速转动,角速度ω=100rad/s,OO1轴通过ad且同时垂直于和bc,距ab的距离是dc的距离的2倍。线圈的输出端接单相理想变压器线圈,接在变压器副线圈两端的灯泡“10V,10W”刚好正常发光。则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045433403146.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543309344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045433403146.jpg)
A.变压器原线圈两端电压有效值为100![]() |
B.变压器原线圈中电流为1A |
C.变压器的原副线圈匝数比为10:1 |
D.通过灯泡的交流电频率为50Hz |
C
试题分析:交流电的最大值为:Em=NBωS=50×
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543356377.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543356377.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045434031232.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543418981.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543434939.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004543450908.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250045434651157.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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