从法拉第电磁感应定律到麦克斯韦方程
From Faraday's Law of Electromagnetic Induction to Maxwell's Equations
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作者信息
- 1. 电子科技大学 物理学院,成都 611731
- 折叠
摘要
在"电磁场与电磁波"及"电动力学"的教学中,由法拉第电磁感应定律导出麦克斯韦方程组中时变磁场产生电场的旋度方程是一个难点.磁通量的变化可以由磁场随时间变化引起,也可由回路运动引起,后者往往被忽略.回路运动产生电动势的规律是否没有体现在麦克斯韦方程组中?媒质运动时麦克斯韦方程组的形式是否需要改变?感应电动势该如何理解和定义?这些问题值得研讨.
Abstract
In the teaching of the courses of Electromagnetic Fields and Electromagnetic Waves and Electrodynamics,the derivation from Faraday's laws of electromagnetic induction to the equation for a time-varying magnetic field generating an electric field in Maxwell's equations is usually fuzzy.The variation of magnetic flux can be caused by the variation of the magnetic field with time,or by the moving of the conductor loop which is usually neglected.Is the electromotive force generated by loop motion not included in Maxwell's equations?Does the form of Maxwell's equations need to be changed when the medium is in motion?How should the induced electromotive force be understood and defined?These questions deserve discussions.
关键词
感应电动势/法拉第电磁感应定律/麦克斯韦方程/运动媒质Key words
induced electromotive force/Faraday's laws of electromagnetic induction/Maxwell's equations/moving media引用本文复制引用
出版年
2024
NETL
NSTL
维普
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