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两个等量同号点电荷的电场强度E和电势在其连线和中垂线上变化这是学生理解电场的重点。其难点主要是因为中学生在构建空间电场的困难,如果能够通过电场线和电势图像形象展示电场细节,结合函数分析,则对学生理解电场有很大的意义。研究背景:1.弄清电场强度与电势的意义,学生对这两个概念的内涵理解不到位,电场强度是反映电荷力的性质,而电势是反映电荷在电场中的能的性质。电场强度为零,电势为零;电势为零,电场强
The electric field strengths E and potentials of the two equal number point charges change on their line and on the vertical line. This is the focus of students’ understanding of the electric field. The difficulty is mainly due to the difficulties of middle school students in constructing space electric fields. If the electric field lines and electric potential images can be used to display electric field details, combined with function analysis, it is of great significance for students to understand electric fields. Research background: 1. Understand the significance of electric field strength and electric potential, students understand the meaning of the two concepts is not in place, the electric field strength reflects the nature of the electric charge, and the electric potential is the nature of the charge in the electric field. The electric field intensity is zero, the electric potential is zero; the electric potential is zero, the electric field is strong