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在大学中,伏安法测电阻是物理系学生必做的电磁学实验之一。它是利用欧姆定律R=U/I通过电表测量电阻R两端的电压U和流过它的电流I来求出电阻值的方法,一般采用电流表内接法和电流表外接法。
In universities, volt-ampere resistance is one of the must-do electromagnetism experiments for physics students. It uses Ohm’s law R = U / I through the meter to measure the voltage U across the resistor R and the current I flowing through it to determine the resistance value method, the general use of ammeter indirect method and ammeter external method.