将粗细均匀的电阻丝围成闭合的等边三角形
,如图所示,分别将
、
和
、
两端接在同一电源上,则两次通过
的电流大小之比是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/c96050d7-c328-4836-a262-ac87d352b4f0.png?resizew=109)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04a2f09a6d56ce328f0fa843ef8fa89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/c96050d7-c328-4836-a262-ac87d352b4f0.png?resizew=109)
A.1:1 | B.2:1 | C.1:2 | D.2:3 |
18-19九年级·全国·单元测试 查看更多[1]
(已下线)第十七章基础达标检测卷
更新时间:2019-09-20 17:46:40
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