如图所示的电路中, A、B是两个相同的灯泡,
、
是自感系数很大,直流电阻为零的线圈,开始时
、
均断开,先闭合
,稳定后再闭合
,则下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/2/15/2924253520355328/2926064613670912/STEM/23621c51-9a2e-4ea6-af3a-4653d3afab0b.png?resizew=233)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910f1655703721b51006b887a2394b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910f1655703721b51006b887a2394b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://img.xkw.com/dksih/QBM/2022/2/15/2924253520355328/2926064613670912/STEM/23621c51-9a2e-4ea6-af3a-4653d3afab0b.png?resizew=233)
A.闭合![]() |
B.闭合![]() |
C.闭合![]() |
D.闭合![]() |
更新时间:2022-02-28 11:56:36
|
【知识点】 含自感线圈的电路闭合及断开后电流的变化及其图像
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【推荐1】丰城中学小明在做自感现象实验时,连接电路如图所示,其中L是自感系数较大、直流电阻不计的线圈,L1、L2是规格相同的灯泡(阻值相同且不变),D是理想二极管,电源,内阻忽略不计。则( )
A.闭合开关S,L1、L2逐渐变亮,然后逐渐熄灭 |
B.闭合开关S,L1逐渐变亮然后不变,L2一直不亮 |
C.断开开关S,L1逐渐变暗至熄灭,L2变亮后再与L1同时熄灭 |
D.断开开关S,L1逐渐变暗至熄灭,L2一直不亮 |
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【推荐2】如图所示,两个相同灯泡
、
分别与电感线圈
和电阻
串联,接到内阻不可忽略的电源的两端,当闭合开关
到电路稳定后,两灯泡均正常发光。已知电感线圈的自感系数很大。则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/4/3/2957342187429888/2959587345408000/STEM/1bfc5c6c-813a-4b44-8877-01efea7d347d.png?resizew=198)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2022/4/3/2957342187429888/2959587345408000/STEM/1bfc5c6c-813a-4b44-8877-01efea7d347d.png?resizew=198)
A.闭合开关![]() ![]() |
B.闭合开关![]() ![]() |
C.断开开关![]() ![]() ![]() |
D.断开开关![]() ![]() |
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