TITLE:
One Method to Derivate Coulomb’s Law between Two Charges
AUTHORS:
Hongwei Zhang, Shimeng Feng
KEYWORDS:
Electrostatic Force, Energy Density, Pressure, Coulomb’s Law
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.8 No.12,
December
17,
2020
ABSTRACT: In electromagnetics, Coulomb’s law is a very classic formula. Almost all textbooks give this formula, but none of them give a detailed corresponding theoretical derivation. In order for beginners of physics to better understand the physical meaning of this formula, we explored the source, the physical model and mechanism of this formula. Based on the principle that the interaction between two different fields can generate energy density, which is equal to the pressure, we analyzed the distribution of the electric field energy density as well as the corresponding pressure on the charged surface. Through the rigorous mathematical derivation, we give the theoretical derivation of this formula.