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伏安法测电阻是高中物理实验的一个重点内容,其原理是欧姆定律:R=U/I在测量U、I值时,常采用电流表外接法或内接法,其电路图如图1所示.从原理
The volt-ampere measurement resistance is a key part of the high school physics experiment. The principle is Ohm’s law: R=U/I When measuring U and I values, it is often used external meter or in-line method. The circuit diagram is shown in Figure 1. From principle