题目内容


如图所示,一根条形磁铁与导线环在同一平面内,磁铁中心恰与环中心重合.为了在环中产生感应电流,磁铁应(    )                                                                                                                               

                                                                                                                  

    A.  向右平动

    B.  向左平动

    C.  N极向外、S极向内转动

    D.  绕垂直于纸面且过O点的轴转动

                                                                                                                                       

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