下列判断正确的是( )
A.根据![]() |
B.![]() |
C.![]() |
D.电解液短时间内导电的![]() |
更新时间:2021-11-20 14:23:46
|
相似题推荐
多选题
|
适中
(0.65)
【推荐1】如图所示电路,电源内阻不能忽略,闭合开关
,当滑动变阻器的滑片
向右滑动时,下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/2016/1/11/1575805741023232/1575805741301760/STEM/c0e1d2de-141d-4511-809d-1e37512fcba0.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/1/11/1575805741023232/1575805741301760/STEM/c0e1d2de-141d-4511-809d-1e37512fcba0.png?resizew=192)
A.电压表V1和电流表A的示数之比不变 |
B.电压表V2和电流表A的示数之比不变 |
C.电压表V1示数变大,电流表A示数变大 |
D.电压表V2示数变大,电流表A示数变小 |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
【推荐2】如图所示,电源电动势为E,内电阻为r,理想电压表
、
示数分别为
、
,其变化量的绝对值分别为
和
;流过电源的电流为I,其变化量的绝对值为
。在滑动变阻器的触片从右端滑到左端的过程中(灯泡
、
、
电阻均不变)( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/030ea1ca-ca8f-4db0-8fab-59a7ad734f97.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fade4e14bf5845ff14f9e95bb6bfef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40f1d184152aa3954752ed70e7d1612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd5f9ecb870fedb5b9a608d9ca2f911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f833a7beb83820ecede0234c671f1878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e272451d8d2263734df061afbc715708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885544a287ed7bcdcabc867fa0b7e787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596fd2f65c2602cbd49aa23e2c4fc6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e76322da99c521981992a53339042c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afbfe404ad5febf1904d763974967b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cddc914628565e13f2980fdfa8caa739.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/030ea1ca-ca8f-4db0-8fab-59a7ad734f97.png?resizew=164)
A.灯泡![]() ![]() ![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
【推荐1】如图所示,图线表示电阻为
的导体A的伏安特性曲线,图线2表示电阻为
的导体B的伏安特性曲线,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844776297234432/2846378651443200/STEM/85da036f-b7c4-4217-8032-5f183720784b.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844776297234432/2846378651443200/STEM/85da036f-b7c4-4217-8032-5f183720784b.png?resizew=142)
A.![]() |
B.把A拉长为原来的3倍后其电阻等于B的电阻![]() |
C.将A与B串联后接在电源上,二者两端的电压之比为1:3 |
D.将A与B并联后接在电源上,通过二者的电流之比为1:3 |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
【推荐2】两电阻R1、R2的U-I图线如图所示,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/faad3894-07ea-401b-81aa-490bb3d52f1c.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/faad3894-07ea-401b-81aa-490bb3d52f1c.png?resizew=139)
A.R1:R2=1:4 |
B.R1:R2=4:1 |
C.若R1与R2为同种金属制成的相同长度金属丝,则R1的横截面面积为R2的4倍 |
D.将R1与R2并联后接在电源上,则通过它们的电流之比I1:I2=1:4 |
您最近一年使用:0次