电磁规律的δ函数表示

Expressing Electromagnetic Law with δ Function

讨论了δ函数的定义及特性,将电动力学中的点、线、面分布电荷、电偶极子的体电荷密度以及线电流和面电流的电流密度用δ函数表示出来,使这些抽象的电磁模型能够准确地量化表示.并运用δ函数的微分表示式证明有关电磁基本定理.

This paper discussed the definition and specific property of δ function and gave the expression for charge distribution of point charge,linear charge and field charge,density of volume charges of electric dipole and the electric current density of line current and surface current with δ function to quantificate the abstract model accurately.At last,the author proved the basic electromagnetic law using the differential form of δ function.