…Magnetic fields are created by permanent magnets, coils carrying current, solenoids, electromagnets, etc., and their strength is inversely proportional to the square of the distance from the magnetic pole. Within a magnetic field, the curve that coincides with the tangent direction of the magnetic field at a point is called a magnetic field line, and the density of the magnetic field lines is proportional to the magnetic field strength at that point. For information on the Earth's magnetic field, see the entries on geomagnetism and magnetosphere. *Some of the terminology that refers to "line of magnetic force" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…磁場は永久磁石や電流を流したコイル,ソレノイド,電磁石などによってつくられるが,その強さは磁極からの距離の2乗に反比例する。磁場内において,その点における磁場の接線方向に一致する曲線を磁力線line of magnetic forceといい,磁力線の密度はその点における磁場の強さに比例している。なお,地球の磁場については〈地磁気〉および〈磁気圏〉の項を参照されたい。… ※「line of magnetic force」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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