两个电阻
和
的伏安特性曲线如图所示,可知两个电阻大小之比
等于( )
![](https://img.xkw.com/dksih/QBM/2021/3/3/2669997459161088/2670886921707520/STEM/8c8907b1-cefd-4b55-8280-f3b3232d33c1.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8c68fc2c1ca39b17fbf7f30206bb52.png)
![](https://img.xkw.com/dksih/QBM/2021/3/3/2669997459161088/2670886921707520/STEM/8c8907b1-cefd-4b55-8280-f3b3232d33c1.png?resizew=175)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-03-04 23:16:15
|
【知识点】 线性元件的伏安特性曲线
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【推荐1】两电阻
、
的伏安特性曲线如图所示,从图线可知判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/c3470dcc-6f58-4e51-bfe4-78b0119bdda6.png?resizew=109)
![](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/2022/11/30/c3470dcc-6f58-4e51-bfe4-78b0119bdda6.png?resizew=109)
A.两电阻的电阻值的关系是![]() | B.当电阻一定时,电流随着电压的增大而减小 |
C.两电阻并联接入电路时,通过![]() | D.两电阻串联接入电路时,通过![]() |
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【推荐2】如图所示,图线1表示的导体的电阻为R1,图线2表示的导体的电阻为R2,则下列说法正确的是 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/457b4fd3-b57c-4944-a1ba-0f6b18cab148.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/457b4fd3-b57c-4944-a1ba-0f6b18cab148.png?resizew=136)
A.将R1与R2两端加上相同电压,则电流之比I1∶I2=1∶3 |
B.将R1与R2通过相同电流,则两端电压之比U1∶U2=3∶1 |
C.R1∶R2=1∶3 |
D.R1∶R2=3∶1 |
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