题目内容
如图4所示,原、副线圈匝数比为2∶1的理想变压器正常工作时
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241422535064429.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241422535064429.png)
A.原、副线圈磁通量之比为2∶1 |
B.原、副线圈电流之比为1∶2 |
C.输入功率和输出功率之比为1∶1 |
D.原、副线圈磁通量变化率之比为2∶1 |
BC
磁通量Φ=BS,与匝数无关,所以磁通量之比为1:1,A错;由输入功率等于输出功率和电磁感应原理可知
,BC对;D错;
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142253849814.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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