大学物理实验测量电阻原理比较及分析

Resistance Measurement of University Physical Experiment is Principle and Analysis

电阻是集成电路中一个基本元件,测量电阻就显得非常重要,物理实验中电阻测量的方法较多,主要为指针式万用表法,伏安法,电桥法,电位差法。每种方法都有都有自己的优点和缺点,指针式万用表法和伏安法是最基本的方法,虽然测量电阻的系统误差较大,但是测量的方法和使用的仪器都很简单,是较为普遍的测量方法。电桥法是通过电桥工作原理制成的一种精度高,使用方便测量电阻的方法。测量电池的内阻,万用表法、伏安法、电桥法都不能实现,然而电位差计能精确测量电池的内阻。本文通过总结电阻测量的方法,有利于激发学生的学习兴趣,提高学生的综合实践能力。

Resistance is a primary element in the integrated circuit, resistance measurement leel very signilicant.In university physical experiments, the methods of resistance measurement are more,mainly for the pointer multimeter, voltammetry, bridge method,and potentiometer method. A variety of methods have its own advantages and disadvantages,pointer multimeter and voltammetry are the most basic methods,while system er-ror of the resistance measurement is more bigger, the measuring methods and instruments using are very easy and kinds of commonly measuring methods.Bridge method in the working principle of the bridge is convenient with a high precision measuring method for resistance.For measurement ofbattery internal resistance, multime-ter, voltammetry,bridge method cannot achieve, however potentiometer can accurately measure internal resist-ance of the battery.It through summarizing method of resistance measurement,which is benelicial to stimulate students’ interest in learning,improve the comprehensive practical ability of students.