题目内容
如图所示,一理想变压器,原副线圈的匝数比为
,有四只完全相同的灯泡连入电路,若L2、L3、L4均能正常发光,则灯泡L1 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241551058933147.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824155105753567.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241551058933147.png)
A.能正常发光 |
B.较另三灯暗些 |
C.将会烧坏 |
D.不能发光 |
A
试题分析:由并联分流可知输出电流为3I,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824155105987626.png)
点评:难度较小,熟悉串并联关系,明确电压比、电流比与匝数比的关系
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.能正常发光 |
B.较另三灯暗些 |
C.将会烧坏 |
D.不能发光 |