题目内容
如图所示,理想变压器原线圈输入交变电流i=Imsinωt,副线圈接有一电流表和负载电阻R,电流表的示数为0.10A .在t=T/4时(T为交变电流的周期),线圈中的电流瞬时值为0.03A。由此可知该变压器的原、副线圈的匝数比为 。![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241342299171930.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241342299171930.png)
10
:3
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134230010307.png)
在t=T/4时(T为交变电流的周期),线圈转过的角度是
,此时电流为i=Imsin
=Im=0.03A,由电流表的示数为0.10A是有效值,副线圈电流的最大值为
,由电流与匝数成反比得
。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134230057890.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134230104421.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134230135810.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241342301821230.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目