电偶极子场强分布的拓展性教学

On Teaching Expansion of Electric Field Intensity Distributions of an Electric Dipole

电偶极子是电磁学中的重要模型之一.为让学生全面掌握电偶极子场强的空间分布和计算方法,在查阅大量文献的基础上,利用叠加原理、电势与场强的关系、等效法导出了电偶极子近区和远区场强的表达式.推导过程体现了数理方法的有机结合,有利于提升学生数理方法应用能力的培养.该推导过程与结果对电偶极子场强分布的拓展性教学具有一定的参考价值.

An electric dipole is one of the important models in Electromagnetics. To enable college students to master comprehensively electric field intensity distribution of an electric dipole and its calculating proce dure, the near field and far field expressions of electric field intensity distribution of an electric dipole have been derived by means of the principle of superposition, the relationship between potential and electric field intensity, and the vector equivalent method based on extensive literatures. The derivation procedure reflects the combination of methods of mathematical physics, is conducive to enhance college students＇ abili ties in applying the methods of mathematical per have a certain reference value for the teac pole. phy hing sics. The derivation procedure and the results in this pa expansion of field intensity distributions of an electric di