题目内容
一根粗细均匀,阻值为8Ω的电阻丝,在温度不变的情况下,先将它等分成四段,每段电阻为
;再将这四段电阻丝并联,并联后总电阻为
。则
与
的大小依次为( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121316877332.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121317079369.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121316877332.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121317079369.png)
A.1Ω,0.5Ω | B.4Ω,1Ω | C.2Ω,0.5Ω | D.2Ω,1Ω |
C
将电阻丝等分成4段,则每段电阻为2Ω,四段电阻并联,则总电阻
.故C正确,A、B、D错误。
故选C。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121317189795.png)
故选C。
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.1Ω,0.5Ω | B.4Ω,1Ω | C.2Ω,0.5Ω | D.2Ω,1Ω |