综合实验试题C:永磁铁通过金属管所产生的涡旋电流损耗功率及累计损耗测量  

Comprehensive problem C: Measuring of vortex current loss powerand cumulative loss energy when a permanent magnetpassing through a metal tube

作　　者：穆翠玲 杨莉莉 林少鹏 何振辉 MU Cuiling;YANG Lili;LIN Shaopeng;HE Zhenhui(School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China;Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China)

机构地区：[1]中山大学物理与天文学院,广东珠海519082 [2]中山大学中法核工程与技术学院,广东珠海519082

出　　处：《物理实验》2024年第3期25-31,共7页Physics Experimentation

摘　　要：第9届全国大学生物理实验竞赛珠海赛区综合实验试题C为测量永磁铁通过金属管所产生的涡旋电流损耗功率及累计损耗.选手需设计并搭建光电门测量装置,测量磁铁下落速度,计算出能量损耗.本文给出了详细的试题设计和参考解答,并结合选手成绩和竞赛调研的统计结果,分析出选手的知识薄弱点和不足能力,为大学物理实验的教学与改革提供参考.The comprehensive problem C of the 9th Chinese Undergraduate Physics Experiment Competition(Zhuhai Division)was to measure vortex current loss power and cumulative loss energy when a permanent magnet passing through a metal tube.The contestants needed to design and build a photoelectric gate device to measure the falling speed of the magnet and calculate the loss energy.The design and reference solutions of the problems were introduced in detail.Based on the competition results and questionnaire responses,the weak knowledge and insufficient ability of contestants had been analyzed to provide reference for the teaching and reform of university physics experiment.

关 键 词：楞次定律 涡旋电流损耗 能量守恒 电磁感应 

分 类 号：O441.2[理学—电磁学]