如图,假定线圈产生磁场全部集中在铁芯中(图中矩形),当滑动变阻器滑片左右滑动时,铁环a能产生感应电流吗?
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![如图,假定线圈产生磁场全部集中在铁芯中(图中矩形),当滑动变阻器滑片左右滑动时,铁环a能产生感应电流吗?](/uploads/image/z/6583102-70-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%81%87%E5%AE%9A%E7%BA%BF%E5%9C%88%E4%BA%A7%E7%94%9F%E7%A3%81%E5%9C%BA%E5%85%A8%E9%83%A8%E9%9B%86%E4%B8%AD%E5%9C%A8%E9%93%81%E8%8A%AF%E4%B8%AD%EF%BC%88%E5%9B%BE%E4%B8%AD%E7%9F%A9%E5%BD%A2%EF%BC%89%2C%E5%BD%93%E6%BB%91%E5%8A%A8%E5%8F%98%E9%98%BB%E5%99%A8%E6%BB%91%E7%89%87%E5%B7%A6%E5%8F%B3%E6%BB%91%E5%8A%A8%E6%97%B6%2C%E9%93%81%E7%8E%AFa%E8%83%BD%E4%BA%A7%E7%94%9F%E6%84%9F%E5%BA%94%E7%94%B5%E6%B5%81%E5%90%97%3F)
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