摘要
本文就学生做自制电势差计测电动势实验中出现检流计指针摆动异常的现象进行分析，研究其原因所在，找出相应的解决方法．
The paper analyzes the abnormal phenomena of galvanometer pointer swing as the student is doing experiment of a self made potentiometer for measuring voltage. The causes of failures are investigated and the corresponding solutions are suggested.
