题目内容
一矩形线圈在匀强磁场中转动,产生交变电流的电动势为e=220
sin100πt V,对于这个交变电流的说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322791344.png)
A.此交变电流的频率为100 Hz,周期为0.01 s |
B.此交变电流电动势的有效值为220 V |
C.耐压为220 V的电容器能够在该交变电路中使用 |
D.t=0时,线圈平面与中性面垂直,此时磁通量为零 |
B
试题分析:由交变电流的瞬时值的表达式知e=Emsin
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322807363.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322838741.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322854469.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322869606.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322791344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003322901348.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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