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读了贵刊2005年第6期中沈瑞清老师的“欧姆定律与电阻定义——欧姆定律两种表述的比较”一文(以下简称沈文),对沈老师的钻研和负责精神表示钦佩.认真研究了此文后,我觉得作为物理教研员,很有必要说出自己的看法,故作此文,与沈老师商榷.“沈文”首先介绍了部分电路欧姆定律两种比较常见的表述:一种是我国中学物理教材中的表述——“导体里的电流 I 跟导体两端的电压 U 成正比,跟导体的电阻 R 成反比”;另一种表述是普通物理和国外大中教材中的表述——“导体里的电流跟其两端电压成正比”.接着文章谈了“欧姆定律和电阻定义的历史演变”“欧姆定律‘中教表述’不可取”“对电流和电阻关系的理解”及“结论”——“在中学教材的欧姆定律
Read your magazine No. 6, 2005 in Shen Ruiqing teacher ”Ohm’s law and definition of resistance - Ohm’s law to compare the two statements,“ a text (hereinafter referred to as Shen Wen), Shen teacher’s research and responsible spirit expressed his admiration. After studying this article, I think as a physics researcher, it is necessary to say my own opinion, so as this article, to discuss with Shen. ”Shen Wen “ first introduced some of the circuit Ohm’s law two more common Statements: one is the Chinese secondary school physics textbook expression - ”conductor current I with the voltage across the conductor is proportional to U, with the resistance of the conductor R is inversely proportional “; the other is the general physical and foreign large The statement in the textbook - ”The current in the conductor is proportional to the voltage across it.“ Then the article talks about the ”unreliableness of the teachings of Ohm’s law and the historical evolution of resistance definitions“ and ”Ohm’s law“ ”“ Understanding of the relationship between current and resistance ”and “ Conclusion ”- " Ohm’s Law in High School Textbooks