伏安法测电阻

实验报告单

学号：2012604

姓名：苏可铮

年级：2020级

学院：数学科学学院

完成日期：2021年5月18日

实验报告用混合量热法测定冰的溶解热

目录

实验目的······························································································1

实验器材······························································································2

实验原理······························································································3

实验内容······························································································5

数据记录与处理·····················································································6

思考题·································································································9

1

实验报告用混合量热法测定冰的溶解热

实验目的

•学习使用伏安法（即电压表、电流表），测定定制电阻阻值；

•学习使用伏安法（即电压表、电流表），测定非线性元件（二极管）通电特性；

•理解并掌握欧姆定律；

1

实验报告用混合量热法测定冰的溶解热

实验器材

•恒压电源

•电流表

•电压表

•微安表

•滑动变阻器

•导线若干

•定制电阻

•二极管

2

实验报告用混合量热法测定冰的溶解热

实验原理

•测金属膜电阻伏安特性

i测110Ω金属膜电阻时，由于，

RxRA

=12.8%,=2.2%

RU+RxRx

即电压表内接法误差电压表外接法误差，故采用电压表外接法。

图1:测金属膜电阻伏安特性电路图

•测晶体二极管正向伏安特性

i测晶体二极管正向电阻时，由于，

RxRA

=66.7%,=0.16%