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一、静态电阻与动态电阻概念电阻是中学物理电学中的一个重要概念,其定义式是R=U/I即导体电阻等于导体两端的电压与通过导体的电流的比值.此定义式是由欧姆定律I=U/R转换而来的,其适用条件是纯电阻(金属导体、液体导体)且导体处在一定的温度下.导体的伏安特性曲线(I-U曲线)是一条过原点的直线,如图1所示.
First, the concept of static resistance and dynamic resistance Resistance is an important concept in secondary physics, its definition is R = U / I that the conductor resistance equal to the ratio of the voltage across the conductor and the current through the conductor.This definition is by Ohm The law of I = U / R conversion, its application conditions are pure resistance (metal conductor, liquid conductor) and the conductor at a certain temperature. The conductor volt-ampere characteristic curve (IU curve) is a straight line through the origin, As shown in Figure 1.