【摘要】 本文用三种方法证明:当导体处于静电平衡状态时,导体表面上厚度为δ,电荷面密度为σ的电荷层内的电场强度为E=σ/（ε₀δ）（δ/2+x）n -δ/2≤x≤δ/2沿导体表面法线方向上电场强度的平均值为E=σ/2ε₀ n式中n是导体表面外法线方向的单位矢量。更多还原

【Abstract】 In this paper three methods are delivered to prove: when a conductoris in electrostatic equilibrium: the electric field sterngth in the layerof the charge on the surface of the conductor isE =σ/ε₀δ（δ/2+x）n -（δ/2） ≤x≤δ/2and the mean electric field strength is E =σ/2ε₀ n, Where ε₀ is the per-mittivity of free space, σ is the charge per unit area of the surface, δis the thick of the layer of the charge, and n is unit vector in normaldirection of the surface.更多还原