等效求解电介质球内退极化场的前提的证明  

PROOF OF ASSUMPTION FOR THE EQUIVALENT SOLUTION OF DEPOLARIZATION FIELD IN THE DIELECTRIC BALL

作　　者：李力[1] 

机构地区：[1]重庆清华中学,重庆400054

出　　处：《物理与工程》2013年第2期24-25,共2页Physics and Engineering

摘　　要：求解均匀极化的电介质球内的退极化场时,由于球面上极化面电荷分布不均匀,一般都用两等大、原本重叠、带均匀等量异号电荷的球体错开微小位移的模型来等效地求解;但这种模型为何与原情景等效,是令初学者困惑的地方.对此,文章给出了一个简单的证明.To solve the depolarization field in the uniform polarized dielectric ball, people commonly assume that there is a tiny displacement between two isochoric balls, which overlap originally with the uniform equivalent different charges, because of the non--uniform distribution of the polarized surface charges on the sphere. Why this model is equivalent with the original sight is a problem confusing the beginners. For this reason, this paper gives a simple proof of this assumption.

关 键 词：均匀极化 电介质球 退极化场 等效 厚度 面电荷密度 

分 类 号：G634.7[文化科学—教育学]