铜金属变温四端电阻实验仪  

TEMPERATURE CONTROL QUADRUPLET RESISTANCE INSTRUMENT OF COPPER WIRE

作　　者：魏国瑞[1] 张建国[1] 李隆[1] 

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《大学物理实验》2005年第3期49-50,共2页Physical Experiment of College

摘　　要：本文首次使用了数显温度可控的功率电阻作为铜金属丝的加热源,在实验中采用了双臂电桥、铜金属丝的四端电阻接线方式,不仅实现了铜金属丝的温度可控性和实时测量性,而且将铜金属温度系数的测量精度提高到3%以内。In this paper the heating source.of copper wire is fast used as the power resistor controlled by temperature control digital indicator. In this experiment the double bridge and quadruplet resistance of wire are obtained. Not only temperature of copper wire is controlled and real - time measured, but also the measuring accuracy of coefficient of copper wire is improved by 3 %.

关 键 词：温度系数 四端电阻 双臂电桥 温度控制数字显示仪 

分 类 号：O441[理学—电磁学]