摘要
在惠斯通电桥实验中,使用高阻抗的数字电压表代替检流计,使电桥灵敏度与桥臂电阻大小无关。能采用电阻箱中阻值大、准确度高的电阻盘,以达到减小测量误差的目的,并简化实验操作步骤。
In the Wheatstone bridge experiment,large inner resistance voltmeter can be used instead of the galvanometer,and the Wheatstone bridge delicacy will be independent of the value of arm resistance.We can reduce the measuring errors and operation steps by using large resistance and high precision resistance panes in the resistance box.
出处
《新乡学院学报》
2011年第3期222-223,226,共3页
Journal of Xinxiang University
关键词
惠斯通电桥
检流计
灵敏度
电压表
Wheatstone bridge
galvanometer
delicacy
voltmeter
