島根大学教育学部紀要. 自然科学

ダウンロード数 : ?
島根大学教育学部紀要. 自然科学 16
1982-12-25 発行

電磁作用に関する生徒実験用磁石

A Study on the Magnets Suitable for Students' Experiment on the Electromagnetic Force
高橋 成和
ファイル
内容記述(抄録等)
The purpose of this study is to seek the magnets suitable for students' experiment on "the force of a magnetic field on a current-carring conductor".
The main apparatus used in this work is a handmade ampere balance. The investigated magnets are as follows : Fe U-type permanent magnets, Al-Ni-Co U and bar-type permanent magnet, handmade U-type electromagnet and Helmholtz coils.
The results are summarized as follows : 1) A weak magnet does not keep a linear relation between the force and the current because the magnet is magnetized by the current and so the magnetic flux changes into a larger or a smaller density. 2) An expected effect was brought out by a magnet constructed with two iron bar pieces as each pole and from one to four Al-Ni-Co bar permanent magnets as magneto-motive-forces. 3) The non-core electromagnets were suitable one.