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大学物理实验,2020,33(1):43-46https://doi.org/10.14139/j.cnki.cn22-1228.2020.01.011
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关于电磁感应法测量载流圆线圈轴线上磁场分布的研究
王倩,张建祥,辛督强,黄海清,罗积军
西京学院 理学院,陕西 西安 710123
Field Distribution about The Axis of Current-Carrying Coil by Electromagnetic Induction
WANG Qian,ZHANG Jianxiang,XIN Duqiang,HUANG Haiqing,LUO Jijun
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摘要

利用毕奥-萨伐尔定律求解载流导线所产生的磁场分布是电磁学中一个非常重要的问题。由于载流圆线圈上的所取的电流元在轴线上某点处所产生的磁感应强度方向的取向是三维空间的取向,导致学生对此普遍认为比较抽象,对计算结果难以理解。本文以载流圆线圈轴线上磁场分布为例,通过电磁感应法测量磁场的实验方法测量载流圆线圈轴线上的磁场,实验测量所得的数据图表能够将载流圆线圈轴线上磁分布特点形象的描绘出来,并且实验结果很好的验证了由毕奥-萨伐尔定律求解得 到的载流圆线圈轴线上磁感应强度公式,此应用在实践教学中将新的实验技术与电磁学理论相结合的教学模式,使抽象的物理概念和公式变得更加具体化、形象化,也收到了良好的教学效果。

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王倩
张建祥
辛督强
黄海清
罗积军
关键词:磁感应强度圆线圈磁场分布轴向磁场毕奥-萨伐尔定律
Abstract:

It is a very essential problem in electromagnetism to solve the distribution of magnetic field generated by current-carrying with the method of Bio-Savart's law .As the magnetic induction intensity dB generated by the current element dl on the current-carrying circular coil at a certain point on the axis is oriented in a three-dimensional space, which leads to the result that students generally think it abstract and difficult to understand . The article takes the magnetic field distribution on the axis of the current-carrying coil as an example,concerning about the magnetic field on the axis of the current-carrying coil is measured by the experimental method of electromagnetic induction.The obtained data charts can visually describe the magnetic distribution characteristics on the axis of the current-carrying circular coil, and the experimental results are very proved of Biot-Savart law. The formula of magnetic induction intensity on the axis of current-carrying circular coil is applied to the teaching mode of combining new experimental technology with electromagnetics theory in practical teaching, so as to make it abstract.Physical concepts and formulas have become more specific and visualized, and have also received good teaching results.

Key words:magnetic induction intensitycircular coilmagnetic field distributionaxial magnetic fieldBio-Savart's law
出版日期:2020-02-25发布日期:2020-02-25整期出版日期:2020-02-25
ZTFLH: O4-34
引用本文:
王倩, 张建祥, 辛督强, 黄海清, 罗积军. 关于电磁感应法测量载流圆线圈轴线上磁场分布的研究 [J]. 大学物理实验, 2020, 33(1): 43-46.
WANG Qian, ZHANG Jianxiang, XIN Duqiang, HUANG Haiqing, LUO Jijun. Field Distribution about The Axis of Current-Carrying Coil by Electromagnetic Induction . Physical Experiment of College, 2020, 33(1): 43-46.
链接本文:
http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2020.01.011http://dawushiyan.jlict.edu.cn/CN/Y2020/V33/I1/43
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