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电场强度E和磁感应强度B是中学物理电磁学郎分中两个极其重要的概念,也是教学中的难点。如何从当前中学物理教学实际情况出发,采用最佳的引入方法,使学生通过自己的积极思维活动,真正理解和掌握其概念的物理意义和定义,乃是中学物理教材教法中一个值得研究的课题,本文对此做一些探讨。 一、E的引入 现行教材是在学习库仑定律之后,在简单介绍电场概念的基础上,运用图1说明电量为q的正检验电荷放在正电荷Q产生的电场不同的位置,受到的电场力不同,从而引入电场强度E的物理意义和定义,这种引入方
The electric field strength E and magnetic induction B are two extremely important concepts in the middle school physical electromagnetism, and it is also a difficult point in teaching. How to proceed from the actual situation of current middle school physics teaching, using the best method of introduction, so that students through their own positive thinking activities, to truly understand and master the concept of its physical meaning and definition, is a worthy study in the middle school physics teaching method Questions, this article does some research on this. I. Introduction of E. The current teaching material is based on the introduction of the concept of the electric field after the learning of Coulomb’s law. Figure 1 shows that the positive charge of q is placed at different positions of the electric field generated by the positive charge Q, and the electric field force is received. Differently, thereby introducing the physical meaning and definition of the electric field strength E, this type of introduction