题目内容
如图2所示,理想变压器原、副线圈的匝数比为10∶1,电压表和电流表均为理想电表,R为副线圈的负载电阻.现在原线圈a、b两端加上交变电压u,其随时间变化的规律u=220
sin 100πt V,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250002388682238.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000238853344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250002388682238.png)
A.副线圈中产生的交变电流频率为100 Hz |
B.电压表的示数22 V |
C.若电流表示数为0.1 A,则原线圈中的电流为1 A |
D.若电流表示数为0.1 A,则1 min内电阻R上产生的焦耳热为132 J |
BD
试题分析:据题意,已知w=2
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000238884282.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000238884282.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000238853344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000238931333.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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