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高中物理(甲种本)第二册“电势差跟电场强度的关系”一节中,关于电势差跟电场强度的方向关系的结论是“场强的方向是指电势降低最快的方向”。本文谈谈在教学中我们是如何讲清“最快”二字的、课本采用了如下步骤进行引导。一、沿电力线的方向,也就是沿着场强的方向,电势越来越低;二、从图6—24中看到,除沿场强方向AB外,沿其他方向AC、AD,电势也都降低。……,但是沿AB方向降低得最快。从而得出结论。这种逐步引导,步步深入是得出结论常采用的步骤和方法,但“最快”的结论仍有一种不具体、不明确的理解。下面以课本原图为基础,谈谈本人对
In the section on the relationship between potential difference and electric field strength in the second volume of High School Physics (A), the conclusion of the relationship between the potential difference and the electric field strength is: “The direction of the field strength refers to the direction in which the electric potential decreases most rapidly.” This article talks about how we explained the “fastest” word in teaching. The textbook used the following steps to guide. First, in the direction of the power line, that is, along the direction of the field strength, the potential is getting lower and lower; secondly, as seen in Figure 6-24, in addition to the direction of field strength AB, in the other direction AC, AD, the potential is also Both are lower. ..., but the fastest decrease in the AB direction. In order to draw conclusions. This kind of step-by-step guidance, step by step, is a step and method that often draws conclusions. However, the “fastest” conclusion still has an unspecific, unclear understanding. The following is based on the original picture of the textbook and talks about my own