关键词: 能量最低原理, 导体, 电容, 泛函极值, 电荷分布

Abstract: This paper demonstrates the ＂principle of minimum energy＂ of a charged system and its corollary, which is applied to analysis and valuation of the conductor capacitance. Through the functional extreme value idea and charge distribution of the trial function, some properties of the capacitance and the valuation methods are given.

Key words: principle of minimum energy, conductor, capacitance, functional extreme value, charge distribution