在学习“电场中的导体”这部分内容时 ,许多学生反映 ,即使把处于静电平衡状态的导体特点记得再清楚 ,但是在解决具体问题时仍然不能灵活应用 .特别是遇到金属球壳的静电平衡问题 ,常常是无从下手 ,找不到好的解决方法 .本文拟从金属球壳在不同的静电平衡条件下 ,应用电场的叠? While learning about the “Conductors in Electric Fields” section, many students report that even if the characteristics of the conductors in the state of static balance are clearly remembered, they cannot be applied flexibly when solving specific problems. In particular, the static electricity of metal spheres is encountered. Balance problem is often impossible to start, can not find a good solution. This paper intends to use the electric field stack from the metal sphere under different conditions of electrostatic equilibrium.