题目内容
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633062394.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633093368.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633093305.gif)
(1)线圈中产生的感应电动势大小。
(2)通过电阻R的电流大小。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241156331403596.gif)
(1)400V(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633140275.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633140275.gif)
(1)由图乙可知,0.01s时:
(2分)
线圈中产生的感应电动势
="400V " (3分)
(2)通过电阻R的电流大小
(3分)
代入数据解得
(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633171749.gif)
线圈中产生的感应电动势
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633171679.gif)
(2)通过电阻R的电流大小
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633187432.gif)
代入数据解得
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633140275.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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