静电平衡是指导体中的电荷处于稳定状态。均匀导体达到静电平衡的条件是导体内部的合场强处处为零。导体中（包括表面）没有电荷定向移动的状态叫做静电平衡状态。
静电平衡过程的特征时间由物质的电导率和电容率决定。
The characteristic time of electrostatic equilibrium process in decided by conductivity and permittivity of material.
现行的电磁学对线电荷的能量公式、静电平衡条件都没有直接推导过。
So far both the formula for energy of line charge and the condition of electrostatic equilibrium have not been directly derived from the current electromagnetism.
本文在静电平衡条件的基础上，应用高斯定理讨论带电导体表面的电场强度。
In this paper, Guass theorem is mainly used to discuss the electric field intensity on the surface of charged conductor on condition of electrostatic equilibrium.
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