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    电磁感应选择题

    法拉第电磁感应定律及其应用1、如图4所示,圆环a和圆环b半径之比为21∶,两环用同样粗细的、同种材料的导线连成闭合回路,连接两圆环电阻不计,匀强磁场的磁感强度变化率恒定,则在a环单独置于磁场中和b环单独置于磁

    李老师

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    共11页 2022-06-14 3知币
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