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.
出处
《大学物理》
北大核心
2015年第7期49-53,共5页
College Physics
关键词
强磁铁
非磁性金属管
磁荷
分子电流
磁滞刹车
strong magnet
non-ferromagnetic metal tube
magnetic charge
molecular current
magnetic braking
