伏安法测电阻是指用电压表测出电阻两端的电压U,用电流表测出通过电阻的电流I,根据R=U/I求出被测电阻的阻值.实验中除了需要测量仪器电压表、电流表外,还要用到待测电阻、开关、导线以及保护电路和改变电阻两端电压达到多次测量求平均值减小误差的滑动变阻器.实验电路如图1所示.在我们实际进行操作时,我们完全可以以此为模型,进行适当的变换,对待测电阻的阻值进行测量. Voltammetry resistance is measured with a voltmeter to measure the voltage across the resistor U, with ammeter measured through the resistance of the current I, according to R = U / I find the resistance of the resistance measured in the experiment in addition to the need to measure the instrument voltage Table, ammeter, but also to be tested resistance, switches, wires and protection circuit and change the voltage across the resistor to achieve multiple measurements to reduce the average error of sliding rheostat. Experimental circuit shown in Figure 1. In our actual When operating, we can use this as a model, make the appropriate transformation, the measured resistance of the resistance measurement.