关于磁滞刹车问题的研究  

Investigation on magnetic brake

作　　者：李忱家 谢丽荣[2] 

机构地区：[1]华中师范大学物理科学与技术学院,湖北武汉430079 [2]广州市第六中学,广东广州510000

出　　处：《大学物理》2015年第7期49-53,共5页College Physics

摘　　要：介绍了2014年中国大学生物理学术竞赛中的"磁滞刹车"问题.通过磁荷及分子电流观点之间的转换,从受力和能量两个角度分析了磁铁的运动及受力.最后得出其运动状态与金属管及磁铁的几何性质、物理性质有关,并进行了实验验证.The phenomenon of magnetic brake in 2014 China Undergraduate Physicists＇ Tournament（ CUPT）is investigated. Through the transform between the magnetic charge and molecular current point of view,the motion and force analysis of strong magnet are carried out,from the angle of force（ mechanics） and energy. It is finally concluded that the motion state of strong magnet is related to the geometric properties of non- ferromagnetic metal tube and itself,and the physical properties of materials. The conclusion has been verified by experiments.

关 键 词：强磁铁 非磁性金属管 磁荷 分子电流 磁滞刹车 

分 类 号：O441.3[理学—电磁学]