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本刊1988年第12期登载了《也谈等效电阻的求法》一文(下称《也谈》),读后甚受启发,求等效电阻的前提是,作出电阻的串联关系合乎规范的等效电路。《也谈》一文中所介绍的等效电路的几种作法,即拉伸法、压缩法和移位法等固然行之有效,但学生却感到难于掌握。其原因是对一些具体电路来说,如何拉伸、如何压缩或移位;没有一定的模式,而且要有较高的抽象思维能力。认为,一些电路之所以不合规范,追根
In the 1988 issue of this issue, the article “Also on the Method of Equivalent Resistance” (hereinafter referred to as “Also Talk”) was read. After reading it, it was inspired. The premise of finding the equivalent resistance is to make the series relationship of the resistance conform to the norm. Equivalent Circuit. Several methods of the equivalent circuit described in the article “Also Talk”, namely the stretching method, compression method, and shift method, are effective, but students find it difficult to grasp. The reason for this is how to stretch, compress, or shift some specific circuits; there is no certain pattern, and there must be a high level of abstract thinking. Think that some circuits are not standardized