对亥姆霍兹线圈磁场分布的分析  

Analysis of Magnetic Field Distribution of Helmholtz Coil

作　　者：薄雪 李化南[1] BO Xue;LI Huanan(College of Physics,Jilin Normal University,Siping 136000,China)

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《大学物理实验》2021年第1期52-55,共4页Physical Experiment of College

摘　　要：利用DH4501D实验仪探究了亥姆霍兹线圈轴线上和轴线外的磁场分布问题。首先通过对单个线圈不同电流下的磁场分布的实验值与理论值对比发现电流大的磁场更接近理论值,更适合用来研究磁场分布问题。然后利用较大电流分别研究了单个线圈以及亥姆霍兹线圈轴线上和轴线外的磁场分布的规律及产生原因。最后利用磁场分布拟合了真空磁导率并与理论值进行了对比。通过对这些问题的研究不仅加深了对毕奥-萨伐尔定律的理解,更加明确了亥姆霍兹线圈的磁场分布规律。It mainly investigated the magnetic field distribution on and off the Helmholtz coil axis by using DH4501D experimental instrument.Firstly,we compared the experimental values with the theoretical values of magnetic field distribution under different electric currents of a single coil,and found that the magnetic field induced by larger current is closer to the theoretical values,thus it was concluded that the higher currents are more suitable for studying the magnetic field distribution.Then the distribution of magnetic field on and off the axis of Helmholtz coil was studied by using higher currents.Finally,the magnetic permeability of vacuum is fitted with the magnetic field distribution and compared with the theoretical value.The study of these problems not only deepens the understanding of Biot-Savart Law,but also clarifies the magnetic field distribution law of Helmholtz coil.

关 键 词：亥姆霍兹线圈 磁场分布 磁感应强度 电流 

分 类 号：O441[理学—电磁学]