大学物理实验报告-改装电表

课程名称：      大学物理实验（一）      

实验名称：      实验9 改装电表           

学院：          物理科学与技术学院            

专业：        课程编号：    

组号：   16     指导教师：                         

报告人：        学号：          

实验地点          科技楼902            

实验时间： 2011 年  05  月  16  日 星期  一       

实验报告提交时间：   2011  年  05   月   23  日        

1、实验目的

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2、实验原理

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3、实验仪器

原电流表量程：      原电流表内阻：

改装后量程：         理论分流电阻：

实际分流电阻：

改装电表量程：            

理论分压电阻：          实际分压电阻：

1、校准电流表时，若标准表的指针满刻度而改装表达不到，应该怎样调节分流电阻使两表同时满刻度？电压表呢？

2、如图，在量程分别为的三量程毫安表中，哪当量程电流最大？哪档量程最小？

3、如图，将内阻为、最大量程刻度为50mV的磁电式电压表串联两个电阻，，使之变成量程分别为3V和5V的双量程电压表，求的数值。

4、电流表中串联适当的电阻即可用作电压表，试说明其理由。