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高中物理课关于静电场的教学中,常常需要分析有关点电荷电场的叠加以及合场强E=0的问题。不过当用电场线形象描绘电场分布时,教材中一般不涉及合场强E=0的点及其附近的情况。但是在近几年来,有的中学教科书中直接画出了这一点及其附近的电场线分布情况,如人民教育出版社高中物理第三册(选修)1991年版的历次印刷本中,在第193页“图6-24丁:等量同种点电荷电场的等
In the high school physics class teaching on the electrostatic field, it is often necessary to analyze the problem of the superposition of the point charge electric field and the combined field strength E=0. However, when the electric field distribution is visually depicted with electric field lines, the teaching site does not generally involve the point where the field strength E=0 and its vicinity. However, in recent years, some secondary school textbooks have directly drawn this point and the distribution of electric field lines near it. For example, in the previous edition of the 1991 edition of the High School Physics Book 3 (Elective) of the People’s Education Press, in the 193th Page” Figure 6-24 D: Equivalent Same Point Charge Electric Field etc.