自制低成本涡流演示球  

Eddy current demonstration ball

作　　者：董井林 冯少安 DONG Jing-lin;FENG Shao-an(The First Middle School of Shimen County,Changde 415300,China)

机构地区：[1]石门县第一中学,湖南常德415300

出　　处：《物理实验》2022年第11期46-49,共4页Physics Experimentation

摘　　要：利用泡沫塑料和铝箔纸制成能产生涡流的小球,并用细线悬挂,通过移动强磁铁让小球发生转动的现象判断涡流的产生,并通过不同电阻小球的转动快慢说明涡流与电阻的关系,即电阻越大,涡流越小.该演示装置取材简单,成本低廉,易于制作,学生能够动手参与,可以培养学生的动手能力、创新能力,从而达到培养学生学科核心素养的目的.Small balls were made of foam plastic and aluminum foil that created eddy current,which were suspended with a thin wire.The generation of eddy current was judged by moving the strong magnet to make the ball rotate,and the relationship between eddy current and resistance was explained by the rotation speed of different resistance balls.The result showed that the larger the resistance,the smaller the eddy current.The demonstration device had the advantages of simple materials,low-cost,easy production and high participation of students,which could cultivate students’practical ability,innovative ability and discipline core quality.

关 键 词：涡流 演示实验 低成本 磁铁 

分 类 号：G633.7[文化科学—教育学]