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在新编现行高中教材《全日制普通高级中学教科书(试验修订本·选修加必修)——物理》(第二册)(以下简称教材)中第110页和112页分别有“几种电介质的介电常数/F·m-1”和“中间充以介电常数为2F/m”两段话,这两段话表明介电常数ε是有单位“F/m”的。笔者认为这是错误的,其理由有三: 第一、教材第110页对介电常数是这样定义的:“电容器极板间充满电介质时电容增大的倍数,叫做电介质的介电常数,用ε来表示。”这表明介电常数是一个倍数,是没有单位的。
In the newly edited high school textbook “Full-time Ordinary High School Textbooks (Experimental Revision, Optional Supplements and Supplements)—Physics” (Volume 2) (hereinafter referred to as “teaching materials”), pages 110 and 112 have “different types of dielectric Two paragraphs: dielectric constant /F·m -1“ and ”intermediate charge with dielectric constant 2F/m“ indicate that the dielectric constant ε has the unit ”F/m“. The author thinks this is wrong and there are three reasons: First, the dielectric constant is defined on the 110th page of the textbook: “The multiple of the capacitance when the capacitor plates are filled with the dielectric is called the dielectric constant of the dielectric. To indicate.” This indicates that the dielectric constant is a multiple and there is no unit.