如图所示的电路中,当开关S由闭合到断开的过程中,两表的示数变化情况是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/b4a7d1d8-479d-4024-84cf-9bda4a87cc3f.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/b4a7d1d8-479d-4024-84cf-9bda4a87cc3f.png?resizew=109)
A.A不变 A1变大 | B.A不变 A1变小 |
C.A变小 A1不变 | D.A变小 A1变大 |
更新时间:2022-11-19 23:23:15
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【推荐1】如图所示的电路,电源电压不变。闭合开关后,电阻
、
均正常工作,在探究电路中电流与电压规律时,下列说法一定正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d95ced42-2cd6-4824-ba72-d8b6bb8c008a.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d95ced42-2cd6-4824-ba72-d8b6bb8c008a.png?resizew=178)
A.测得的A处电流与D处电流大小关系为![]() |
B.测得的B处电流与C处电流大小关系一定为![]() |
C.测得的![]() ![]() ![]() |
D.测得的![]() ![]() |
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【推荐2】如图所示的电路中,
,S断开时,电流表的示数为I1,S闭合时,电流表的示数为I2,则I1与I2之比是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/c7cdfa78-8013-42ab-8d77-830ff76f29b0.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1d23f6669999db3df630ddc2eb866e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/c7cdfa78-8013-42ab-8d77-830ff76f29b0.png?resizew=201)
A.3∶2 | B.2∶3 | C.1∶2 | D.2∶1 |
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