题目内容
如图所示,匀强磁场的磁感应强度B=0.1 T,金属棒AD长0.4 m,与框架宽度相同,电阻r=1/3 Ω,框架电阻不计,电阻R1=2 Ω,R2=1 Ω.当金属棒以5 m/s速度匀速向右运动时,求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241412160581866.jpg)
(1)流过金属棒的感应电流为多大?
(2)若图中电容器C为0.3 μF,则电容器中储存多少电荷量?
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241412160581866.jpg)
(1)流过金属棒的感应电流为多大?
(2)若图中电容器C为0.3 μF,则电容器中储存多少电荷量?
:(1)0.2 A (2)4×10-8C
(1)金属棒产生的电动势
E=BLv=0.2 V
外电阻R=
=
Ω
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241412161824894.png)
(2)电容器两板间的电压U=IR=
V
带电荷量Q=CU=4×10-8C.
E=BLv=0.2 V
外电阻R=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141216073576.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141216136382.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241412161824894.png)
(2)电容器两板间的电压U=IR=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141216307408.png)
带电荷量Q=CU=4×10-8C.
![](http://thumb2018.1010pic.com/images/loading.gif)
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