题目内容
如图所示的电路中,
和
是完全相同的两只灯泡,线圈L的电阻可以忽略,下面说法中正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242233478553515.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223345593328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223346576355.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242233478553515.jpg)
A.合上开关S接通电路时,![]() ![]() |
B.合上开关S接通电路时,![]() ![]() |
C.断开开关S切断电路时,![]() ![]() |
D.断开开关S切断电路时,![]() ![]() |
B
试题分析:合上开关S接通电路时,两支路电流增加,所以灯泡A2马上亮起来,而在A1支路中线圈L上会产生自感电动势,阻碍电流的增加,所以使得电灯
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223345593328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223346576355.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223345593328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223345593328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223400554235.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223400554235.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223346576355.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223345593328.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824223346576355.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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