某同学测得某白炽灯的伏安特性曲线如图所示。图像上A点与原点的连线与横轴成
角,A点的切线与横轴成
角,则( )
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759721182289920/2760386393759744/STEM/4565d4fa2dd744009894e2fd274cad92.png?resizew=236)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759721182289920/2760386393759744/STEM/4565d4fa2dd744009894e2fd274cad92.png?resizew=236)
A.白炽灯的电阻随电压的增大而减小 |
B.在A点,白炽灯的电阻可表示为![]() |
C.在A点,白炽灯的电功率可表示为![]() |
D.在A点,白炽灯的电阻不能表示为![]() |
更新时间:2021-07-09 10:03:24
|
【知识点】 非线性元件的伏安特性曲线
相似题推荐
单选题-单题
|
适中
(0.65)
名校
【推荐1】两个电阻R1、R2的伏安特性曲线如图所示,由图可知( )
![](https://img.xkw.com/dksih/QBM/2023/8/22/3308611393347584/3309081385869312/STEM/8abae416ff4e4b4187fc105691695f29.png?resizew=181)
![](https://img.xkw.com/dksih/QBM/2023/8/22/3308611393347584/3309081385869312/STEM/8abae416ff4e4b4187fc105691695f29.png?resizew=181)
A.当U=1 V时,R2的电阻小于R1的电阻 |
B.R1的电阻R1=tan 45° Ω=1 Ω |
C.R2的电阻随电压的增大而减小 |
D.R1的电阻为2 Ω |
您最近一年使用:0次
单选题-单题
|
适中
(0.65)
名校
【推荐2】小灯泡通电后,其电流I随所加电压U变化的图线如图所示,P为图线上一点,
为图线的切线,
为U轴的垂线,
为I轴的垂线,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/d71167e5-be0c-43cf-a61b-84df8e78b5a1.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/d71167e5-be0c-43cf-a61b-84df8e78b5a1.png?resizew=161)
A.随着所加电压的减小,小灯泡的电阻增大 |
B.随着通过电流的增大,小灯泡的电阻减小 |
C.对应P点,小灯泡的电阻为![]() |
D.对应P点,小灯泡的电阻为![]() |
您最近一年使用:0次