惠斯通电桥灵敏度的实验研究 摘 要：惠斯通电桥测电阻是大学物理实验基本实验之一。影响其测量精度的一个重要因素是电桥灵敏度，而电桥灵敏度又与电路灵敏度和检流计灵敏度有关，因此电桥灵敏度与电路中的各因素和检流计有关。本文简单介绍了惠斯通电桥测电阻的原理并推导了电桥灵敏度的公式。利用实验，从检流计灵敏度、电源电压、检流计和电源接入线路的位置和检流计内阻等几个方面分析了电桥灵敏度的各个影响因素。得出了电桥灵敏度和各因素之间的关系，从而提出提高电桥灵敏度的方法。
关键词：惠斯通电桥；灵敏度；电阻
The Sensitivity of Wheatstone Bridge Experiment Research
Abstract: The Wheatstone bridge which is one of the measured resistance ways is a basic experiment in university physics experiments. Bridge sensitivity is an important factor affected the accuracy of measurement, which associated with circuit sensitivity and galvanometer sensitivity, so the bridge sensitivity is associated with each factor and the galvanometer in circuit. This article simply introduces the principle of Wheatstone bridge measuring resistance and deduces the formula of bridge sensitivity. Using experiment, analyzes the influence factors of the bridge sensitivity from aspects of the sensitivity of galvanometer, power supply voltage, the location of the access line of galvanometer sensitivity and power and the resistance of galvanometer etc. And obtains the relationship between bridge sensitivity and various factors, and then the method to improve bridge sensitivity.
Key Words: Wheatstone bridge; Sensitivity; Resistance
目 录
摘要 1
引言 1
1.实验原理 2
1.1惠斯通电桥测电阻原理 2
1.2电桥灵敏度的简单介绍 3
2.电桥灵敏度的实验探究 5
2.1实验器材 5
2.2实验内容与数据 7
3.结果分析 9
3.1电桥灵敏度与电源电压E的关系结果分析 9
3.2电桥灵敏度与检流计和电源电压位置的关系结果分析 9
3.3电桥灵敏度与检流计灵敏度的关系结果分析 9
3.4电桥灵敏度与检流计内阻 极限流电阻 的关系结果分析 10
3.5电桥灵敏度与四个桥臂阻值及 的关系结果分析 10
4.结束语 11
参考文献 11
致谢 12,3427