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图像法是采用近似处理的手段简化求解过程常用方法，具有广泛的应用，纵观近几年物理竞赛试题，越来越多地注重了这种能力的考查，对于两个相互串联的电学元件，伏安特征曲线图像相交法的应用有下列两种情况．１作直线相交法 如果其中之一是线性的．另一个是非线性，如二极管，
The image method is a commonly used method that simplifies the solution process by means of approximate processing. It has a wide range of applications. Looking at the physics contest questions in recent years, more and more attention is paid to the examination of this ability. For two mutually connected electrical components, The application of volt-ampere characteristic image intersection method has the following two conditions. 1 for linear intersection if one of them is linear. The other is nonlinear, such as a diode,