论文部分内容阅读
带电的平衡导体,表面内部的电场强度为0,表面外部的电场强度突然增加到定值,因此,导体的表面称为电场强度的突变面.然而,电场强度经过导体的表面究竟是否由0突然增加到某一定值呢?我们认为不一定.在一般情况下,电荷分布在导体的表面上,总有一定的厚度,设为δn.当然,δn是很小的,但它绝不可能是0.当考虑到δn的存在,由高斯定律即不难证明电场强度E经过导体表面还是由0连续增加到定值的.因此,考虑到电荷在导体表面上分布的厚度δn时,导体的表面就不是什么电场强度E的突变面了.
Charged balanced conductors, the electric field strength inside the surface is 0, the electric field strength outside the surface suddenly increases to a fixed value, so the surface of the conductor is called the sudden change of the electric field strength.However, whether the electric field intensity passes through the surface of the conductor suddenly changes from 0 In general, the charge distribution on the surface of the conductor, there is always a certain thickness, set δn. Of course, δn is very small, but it can never be 0 When considering the existence of δn, it is not hard to prove by Gauss’s law that the electric field intensity E continuously increases to the fixed value through the surface of the conductor or from 0. Therefore, considering the thickness δn of electric charge distributed on the surface of the conductor, the surface of the conductor It is not a sudden change in electric field intensity E.