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等量同种电荷和等量异种电荷的电场是高中物理中的常见模型,对这两个模型的分析和研究对学生理解电场的性质,认识与电场相关的物理量很有帮助.笔者将从电场线、电场强度与电势的特点,以及图像等多角度对等量同异种电荷的电场加以分析,以帮助学生深刻理解电场强度、电势的概念,掌握分析此类问题的方法.
The same electric charge of the same kind and the electric field of the same amount of different kinds of electric charges are common models in high school physics. The analysis and study of these two models are very helpful for students to understand the nature of the electric field and recognize the physical quantities related to the electric field. Line, electric field strength and potential characteristics, as well as images and other multi-angle analysis of the same amount of the same electric field with different charges to help students a deep understanding of the electric field strength, the concept of potential to master the analysis of such problems.