大学物理 ›› 2020, Vol. 39 ›› Issue (11): 36-38.doi: 10.16854 /j.cnki.1000-0712.190534

• 物理实验 • 上一篇    下一篇

利用驻波测量弦线的直径及其杨氏模量

董勇,张洁   

  1. 1. 湖南师范大学物理与电子科学学院,湖南长沙410081; 2. 湖南中医药大学信息科学与工程学院,湖南长沙410208
  • 收稿日期:2019-11-20 修回日期:2020-03-10 出版日期:2020-11-10 发布日期:2020-11-16
  • 作者简介:董勇( 1981—) ,男,湖南岳阳人,湖南师范大学物理与电子科学学院中级实验师,硕士,主要从事大学物理实验室管理员工作

Measurement of the cord diameter and Young's modulus by standing wave

DONG Yong1,ZHANG Jie2   

  1. 1. School of Physics and Electronics,Hunan Normal University,Changsha,Hunan 410081,China; 2. School of information science and engineering,Hunan University of Chinese Medicine,Changsha,Hunan 410208,China
  • Received:2019-11-20 Revised:2020-03-10 Online:2020-11-10 Published:2020-11-16

摘要:

本文搭建了简单的实验装置观察到通电弦线上的驻波现象,结合流体静力称衡法测量了铜的体密度,从而得到弦线的直径,测量了弦线被拉伸时的长度变化量,得到了弦线的杨氏模量.

关键词: 驻波, 静力称衡法, 杨氏模量

Abstract:

 An experiment is designed to observe the standing wave on the electrified cord. The density of copper is measured by Hydrostatic weighing method,then the diameter of the cord can also be obtained. The Young's modulus is obtained by measuring the length variation of the cord.

Key words: standing wave, hydrostatic weighing method, Young's modulus