教学讨论

积分求解余弦分布球面电荷的电场

  • 张志良 ,
  • 郑瑶 ,
  • 池澄 ,
  • 胡冰璐
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  • 浙江师范大学物理系,浙江金华321004
张志良( 1965—) 男,浙江嘉兴人,浙江师范大学物理系教授,博士,从事电声换能器研究和电磁学教学

收稿日期: 2017-04-21

  修回日期: 2017-10-30

  网络出版日期: 2018-03-20

基金资助

国家自然科学基金资助项目( 11174255)

An integral approach to electric field of charges on spherical surface with cosine distribution

  • ZHANG Zhi-liang ,
  • ZHENG Yao ,
  • CHI Cheng ,
  • HU Bing-lu
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  • Department of Physics,Zhejiang Normal University,Jinhua,Zhejiang 321004,China

Received date: 2017-04-21

  Revised date: 2017-10-30

  Online published: 2018-03-20

摘要

积分求解了余弦分布球面电荷( σ=σ0cos θ) 的电场.首先合成场点所张立体角在球面所围的2个面元上电荷元的磁场,被积函数是容易积分的单变量三角函数.积分得到的总合成电场与已有结果相同.

本文引用格式

张志良 , 郑瑶 , 池澄 , 胡冰璐 . 积分求解余弦分布球面电荷的电场[J]. 大学物理, 2018 , 37(3) : 6 -8 . DOI: 10.16854 /j.cnki.1000-0712.170216

Abstract

The electric field of charges on spherical surface with cosine distribution ( σ=σ0cos θ) is solved by the integral method. By composition of the electric fields of the charge elements on the two surface area elements enclosed by a solid angle at the field point at first,the resultant fields can be easily obtained. The results are the same with the existing ones.
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