大学物理 ›› 2018, Vol. 37 ›› Issue (3): 6-8.doi: 10.16854 /j.cnki.1000-0712.170216

• 教学讨论 • 上一篇    下一篇

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   

  1. 浙江师范大学物理系,浙江金华321004
  • 收稿日期:2017-04-21 修回日期:2017-10-30 出版日期:2018-03-20 发布日期:2018-03-20
  • 作者简介: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
  • 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   

  1. Department of Physics,Zhejiang Normal University,Jinhua,Zhejiang 321004,China
  • Received:2017-04-21 Revised:2017-10-30 Online:2018-03-20 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.

关键词: 球面电荷, 余弦分布, 立体角, 积分法

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.

Key words: charges on spherical surface, cosine distribution, solid angle, integral method