模拟静电场的多媒体软件制作

Making of Multimedia Software of Electrostatic Field with Simulation

在实验上描绘静电场通常使用模拟的方法，对于柱极场，其等势面是一个个同心圆柱面，电势与圆半径之间存在着Ｕ～ｌｎｒ线性关系，在坐标纸上人工作出Ｕ～ｌｎｒ曲线增大了实验的误差。通过最小二乘法对实验点进行直线拟合，并使用多媒体著作工具ＭｕｌｔｉｍｅｄｉａＴｏｏｌＢｏｏｋ制作多媒体软件〔１～３〕，保持了实验的精确度。对误差较大的Ｕ＝１００伏实验点进行一次修正后，直线拟合的结果与理论值相符。

It is often used to simulate a field in experiment to describe electrostatic field.In the electrostatic field whose plates were cylindrical plates,the equipotential surfaces were a series of circumferences whose centers were in a point. There was a linear relation between U～lnr. Here U was electric potential and r was radium.It would raise errors when drewing a curve of U～lnr by mental work.The paper used a method of minimum twice multiply to draw a straight line of U～lnr that kept the accuracy of experiment, and made a multimedia software by Multimedia ToolBook〔1～3〕.After correcting the value at U=100 volt,the outcome of calculating by the method of minimum twice multiply corresponded accurately to the value of theory.