电磁学两个常见问题辨析  

Analysis of Two Common Problems in Electromagnetism

作　　者：王建永[1] 刘翠红[1] 邹华[1] 赵长青[1] WANG Jianyong;LIU Cuihong;ZOU Hua;ZHAO Changqing(College of Mechanics and Engineering Science,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学力学与工程科学学院,江苏南京210098

出　　处：《河南财政金融学院学报(自然科学版)》2025年第1期52-54,共3页Journal of Henan Finance University(Natural Science Edition)

基　　金：全国高等学校大学物理改革研究项目(2024PR010);常州市物理学会教研课题(CW20240203);常州市物理学会教研课题(CW20240204)。

摘　　要：在目前的电磁学教学中,经常遇到两个问题:一个是带电曲面上的电场或通电曲面上的磁场有无意义,是否需要计算;另一个是在计算复杂电容器的电容时,把复杂电容器等效成若干简单电容器的串并联,但没有给出这种等效计算方法的正确性的理论分析。对于第一个问题,通过详尽分析,认为带电曲面上的电场或通电曲面上的磁场没有意义,无需计算;对于第二个问题,给出了该种等效计算方法的正确性的理论分析。In current electromagnetics teaching,two problems are often encountered.One is whether the electric field on a charged curved surface or the magnetic field on a current curved surface is meaningful,and whether it needs to be calculated.The other is that when calculating the capacitance of a complex capacitor,the complex capacitor is equivalent to a number of simple capacitors in series and parallel.But no theoretical analysis on the correctness of this equivalent calculation method is given.For the first problem,through detailed analysis,it is put forward that the electric field on the charged curved surface or the magnetic field on the current curved surface has no meaning and need not be calculated.For the second problem,theoretical analysis on the correctness of the equivalent calculation method is given.

关 键 词：电磁学 曲面 场强 电容器 串并联 

分 类 号：O441.1[理学—电磁学]