基础实验试题D:电桥及其应用

Fundamental test D:Electric bridge and its application

介绍了第7届全国大学生物理实验竞赛基础实验试题D的实验内容,给出了参考答案,并分析了实验竞赛结果.基础实验试题D包含3部分:测量电源内阻,测量金属导体的电阻,测量待测物体的质量.试题属于大学物理实验的基础实验,内容涉及单臂平衡电桥、双臂平衡电桥及非平衡电桥,重点考察学生将所学的电桥知识进行灵活运用和拓展,并与实际应用相结合的能力.

The experiment content,solutions and result analysis of the fundamental test D of the 7th Chinese Undergraduate Physics Experiment Competition were given and discussed.The fundamental test D consisted of 3 sections:measuring the internal resistance of a power source,measuring the resistance of a metal conductor,measuring the mass of an object.The experiment content contained single-arm balance electric bridge,double-arm balance electric bridge and unbalance electric bridge,which all were conventional experiments in college physics experiment.The experiment was designed to examine the students’ability to apply and expand the learned electrical knowledge flexibly,as well as the ability to solve practical problem.