摘要
在惠斯登电桥实验中,使用高阻抗的数字电压表代替检流计,使电桥的灵敏度与桥臂电阻的大小无关。这样,就能使用电阻箱中阻值大、准确度高的电阻盘,以达到减小测量误差的效果,并简化了实验操作步骤。
In the Wheatstone bridge experiment,large inner csistance voluneter can be used instead of the galvanometer ,and the Wheatstone bridge delicacy wiU be independent of the value of arm resistance. In this way, we can reduce the measuring errors and operation steps by using hrge resisnce and high precision resistance panes in the resistance box.
出处
《大学物理实验》
2009年第1期60-63,共4页
Physical Experiment of College
关键词
惠斯登电桥
检流计
灵敏度
电压表
Wheatstone bridge
galvanometer
delicacy
voltmeter
