摘要
文章讨论了用惠斯登电桥测未知电阻Rx时，只有在一定条件下，用交换片才能消除R1、R2带来的误差。
It is discussed that when Wheatstone bridge is used to measure the unknown resistance the er ror caused by R1、R2 can be got rid of only under certain circumstance.
出处
《大学物理实验》
1997年第4期27-28,共2页
Physical Experiment of College
关键词
惠斯登电桥
电阻
Wheatstone bridge
electric resistance
