题目内容
如图所示电路中,L是一个带铁芯的线圈,R为纯电阻,两支路的直流电阻相等,A1、A2为双向电流表,在接通和断开开关S的瞬间,两电流表读数I1、I2分别是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241402253163291.png)
A.I1<I2,I1>I2 | B.I1<I2,I1=I2 |
C.I1<I2,I1<I2 | D.I1=I2,I1<I |
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241402253163291.png)
B
当电路接通时,线圈产生与原电流相反的自感电流阻碍原电流的增大,I1<I2,电路稳定后断开开关,自感线圈产生与原电流相同的自感电流,顺时针流过两电表,I1=I2,B对;
![](http://thumb2018.1010pic.com/images/loading.gif)
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