题目内容
如图所示,L是自感系数很大、电阻很小的线圈,若合上或断开开关S1和S2时,可能发生的情况是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241741308662408.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241741308662408.jpg)
A.只闭合S1的瞬间,L1灯逐渐亮起来 |
B.再合上S2稳定后,L2灯是暗的 |
C.只断开S1的瞬间,L1灯立即熄灭,L2灯亮一下再熄灭 |
D.只断开S1瞬间,L2和L1灯过一会儿才熄灭 |
ABC
试题分析:只闭合
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174130897318.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131100313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131318263.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131568375.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131833341.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174130897318.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131318263.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174131833341.png)
故选ABC
点评:关键是看L中的电流的变化和L和哪一个组成闭合回路
![](http://thumb2018.1010pic.com/images/loading.gif)
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