【摘要】 静电场中的带电体模型，是处理实际问题的教学模型．模型的数学化，在使问题定量化的同时，也为其带来了使用上的局限性．本文主要讨论带电体模型对零电位选择的限制．更多还原

【Abstract】 Electric model in the static electric field is a mathematical model in dealing with the practical problems. It’s mathematical model brings about the advantages at analyzing the problems quantitatively and the limitation. This paper mainly discusses the limit of the electric model to the selecting electrical null.更多还原