一、问题的由来新教材《高中物理第二册》(试验修订本·必修加选修 )中 ,对平行板电容器的电容是这样叙述的 :“平行板电容器的电容 C,跟介电常数ε成正比 ,跟正对面积 S成正比 ,跟极板间的距离 d成反比 .写成公式有 C=εS4πkd,式中的 k为静电力常量”.另外还给出了如表 1所示 First, the origin of the problem The new textbook “secondary school physics” (test revision of the compulsory plus optional), the capacitance of the parallel plate capacitor is described as follows: "The capacitance of the parallel plate capacitor C, with the permittivity ε into It is proportional to the area S, and is inversely proportional to the distance d between plates. The formula is C=εS4πkd, where k is the electrostatic force constant. Also shown in Table 1.