题目内容
如图所示,一理想变压器原线圈匝数n1=110匝,副线圈匝数n2=11匝,交流电源的电压μ=311Sin100πt(V),电阻R=44Ω,电压表、电流表均为理想电表,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011198319056.png)
A.交流电的频率为50Hz
B.电流表A2的示数为0.5A.
C.电流表A1的示数为
A
D.电压表的示数为44V
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011198319056.png)
A.交流电的频率为50Hz
B.电流表A2的示数为0.5A.
C.电流表A1的示数为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001119862413.png)
D.电压表的示数为44V
AB
试题分析:由U=311Sin100πt(V)知ω=100π=2πf,得f=50Hz,A正确;输入电压的有效值U1=220V,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001119878653.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001119894733.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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