摘要
从电磁学角度,对2021年国际青年物理学家锦标赛(IYPT)的第二题“旋转磁铁”进行了电磁学理论分析以及实验验证。给出了圆柱形电池与磁铁所构成的模型的运动状态的判断,并分析了磁铁与电池以及锡纸所构成整体的动力来源,以及影响运动的因素。研究结果表明:电源电动势、纽扣磁铁的磁通量、电池与磁铁所组成的整体转动惯量等都会影响磁铁和电池形成的联合体的运动状态。
From the perspective of electromagnetics,the second question"rotating magnet"of the 2021 International Young Physicists Championship(IYPT)is theoretically analyzed and experimentally verified.The motion state of the model composed of battery and magnet is judged,and the power source of the whole composed of magnet,battery and tinfoil and the factors affecting the motion are analyzed.The results show that the electromotive force of the power supply,the magnetic flux of the button magnet and the rotational inertia of the battery and the magnet all affect the motion state of the union formed by the magnet and the battery.
作者
唐豪
谢瑜
杨佳东
杨占金
Tang Hao;Xie Yu;Yang Jiadong;Yang Zhanjin(Xinjiang Agricultural University,Urumqi 830052,China)
出处
《科学技术创新》
2022年第8期18-21,共4页
Scientific and Technological Innovation
关键词
旋转磁铁
纽扣磁铁
动力来源
Rotating magnet
Button magnet
Power source
