• 教学讨论 •

### 关于《有限长带电导体直线的电荷分布》的商榷

1. 1. 广州理工学院 通识教育学院，广东 广州510540；2. 赣南医学院 医学信息工程学院，江西 赣州341000；
3. 长沙学院电子信息与电气工程学院，湖南 长沙410022；4. 长安大学 理学院应用物理系，陕西 西安710064
• 收稿日期:2021-08-16 修回日期:2021-11-28 出版日期:2022-06-15 发布日期:2022-06-15
• 通讯作者: 莫云飞，Email:moyunfei8899@ccsu.edu.cn
• 作者简介:周群益（1955—），男，湖南衡阳人，广州理工学院副教授，从事大学物理教学工作.
• 基金资助:
广东省高校科研特色创新项目（2020KTSCX209）;自然国家科学基金（12004053）；湖南省教育厅科学研究顶目（19C0176）资助

### Discussion on “The electric charge density distribution  of a charged conducting definite straight line”

ZHOU Qun-yi1, ZHOU Li-li2, MO Yun-fei3, HOU Zhao-yang4

1. 1. College of General Education, ‘Guangzhou Institute of Science and Technology, Guangzhou, Guangdong 510540, China;
2. School of Medical and Information Engineering，Gannan Medical University，Zhangzhou, Jiangxi 341000, China;
3.School of Electronic Information and Electrical Engineering, Changsha University, Changsha, Hunan 410022, China;
4. School of Science,Chang’an University, Xi’an, Shaanxi 710064, China
• Received:2021-08-16 Revised:2021-11-28 Online:2022-06-15 Published:2022-06-15

Abstract: The error in the formula of the charge distribution linear density of a finite-length charged linear conductor in the literature is pointed out, and a variety of methods are used to prove that the charge distribution of the charged wire section is uniform. The equipotential line equation and electric field equation of the uniformly charged section are deduced, and it is proved that the charged section is the equipotential line, and the electric field line is perpendicular to the line section. It is proved that the electric potential outside the line segment satisfies the three-dimensional Laplace equation, so as to prove that the uniformly charged line segment is a conductor.