从“处于静电平衡的导体内部场强处处为零,导体是等势体”等性质出发,并利用电场线这一形象工具,不仅可以定性地讨论、还可以定量分析导体平衡问题.本人在长期从事辅导学生物理竞赛过程中,发现学生对静电场这类问题的处 From the “electrostatic field balance in the conductor of zero everywhere inside the field, the conductor is the equipotential body ” and other properties, and the use of the image of the electric field lines tool, not only can be qualitatively discussed, but also quantitative analysis of conductor balance problem. Engaged in counseling students in the long-term physical competition process, found that students such problems of the electrostatic field office