如图所示,两个灯泡
和
的规格相同,
与线圈L串联后接到电路中,
与可变电阻R串联后接到电路中。先闭合开关S,调节R,使两个灯泡的亮度相同,再调节
,使它们正常发光,然后断开开关S,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/b5ed4712-03c5-44ca-9a27-f300ceebad3f.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf35aa115963656d885b6440d6caa2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e65b2e896a5c2371ef4d17d58d2709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf35aa115963656d885b6440d6caa2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e65b2e896a5c2371ef4d17d58d2709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/b5ed4712-03c5-44ca-9a27-f300ceebad3f.png?resizew=200)
A.重新接通电路,![]() |
B.重新接通电路,![]() ![]() |
C.接通电路,电路稳定后再次断开S,A2先熄灭 |
D.接通电路,电路稳定后再次断开S,![]() |
更新时间:2024-04-01 16:53:00
|
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【推荐1】如图甲、乙所示的电路中,电阻R的阻值小于灯A的电阻,电路稳定时自感线圈L的电阻为零,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/fbfd3330-b6f2-4b32-a164-01855c7c2e09.png?resizew=335)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/fbfd3330-b6f2-4b32-a164-01855c7c2e09.png?resizew=335)
A.在电路甲中,接通S时,A将立即亮起来 |
B.在电路甲中,接通S稳定后断开S,A将先变得更亮,然后逐渐变暗 |
C.在电路乙中,接通S时,A将逐渐亮起来 |
D.在电路乙中,接通S稳定后断开S,A将先变得更亮,然后逐渐变暗 |
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【推荐2】如图所示,L1、L2为两个相同的灯泡,线圈L的直流电阻不计,灯泡L1与理想二极管D相连,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/4/15/2966027460739072/2966443356069888/STEM/1e3d6ce4-5fad-4faf-abca-5c4a83fbd8b3.png?resizew=161)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2966027460739072/2966443356069888/STEM/1e3d6ce4-5fad-4faf-abca-5c4a83fbd8b3.png?resizew=161)
A.闭合开关S的瞬间,L1逐渐变亮,L2立刻变亮 |
B.闭合开关S稳定后,L1比L2更亮 |
C.断开S的瞬间,L2会立即熄灭 |
D.断开S的瞬间,a点的电势比b点低 |
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【推荐1】如图所示是研究通电自感实验的电路图,A1、A2是两个规格相同的小灯泡,闭合电键调节滑动变阻器R的滑动触头,使两个灯泡的亮度相同,调节滑动变阻器R1的滑动触头,使他们都正常发光,然后断开电键S。再重新闭合电键S,则( )
![](https://img.xkw.com/dksih/QBM/2020/5/26/2470959664209920/2471152144572416/STEM/b6cb5cb2-c7d8-42d9-afb5-91edfeed7743.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/2020/5/26/2470959664209920/2471152144572416/STEM/b6cb5cb2-c7d8-42d9-afb5-91edfeed7743.png?resizew=206)
A.稳定后,L和R两端的电势差一定相同 | B.稳定后,A1和A2两端电势差不相同 |
C.闭合瞬间,A1、A2均立刻变亮 | D.闭合瞬间,A1立刻变亮,A2逐渐变亮 |
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【推荐2】如图所示,电路中A1和A2是完全相同的灯泡,线圈L电阻不可忽略,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/42fbdaf2-1d45-48dd-b41d-81119fe37518.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/42fbdaf2-1d45-48dd-b41d-81119fe37518.png?resizew=142)
A.合上开关K接通电路时,A1和A2均立即点亮 |
B.合上开关K接通电路时,A2先亮,A1后亮,最后一样亮 |
C.断开开关K切断电路时,A1和A2都要过一会儿才熄灭 |
D.断开开关K切断电路时,A2立刻熄灭,A1闪亮一下才熄灭 |
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