带电球带电介质球和带电导体球电场能量比较

Comparison of electric field energy of different charged sphere

依据电场能量密度的定义计算了带电球、带电介质球和带电导体球的电场能量,结果发现三者均不相同.通过分析产生这一差异的原因,揭示出电场能量与电场分布的依赖关系.

Calculate the electric field energies of a charged sphere, a charged dielectric sphere and a charged conductive sphere, according on the definition of electric field energy density. The results are different each other. Analysis shows that electric field energy is relative with the distribution of electric field.