...If the potential difference is V , the length of the material between the electrodes is l , and the cross-sectional area is S , then the current I is given by I = (σ S / l ) V. Here, σ is a quantity specific to the material, called electric conductivity, and is equal to the reciprocal of resistivity. When the electric field V / l in the material is small, σ is constant and the current I and the potential difference V are proportional. ... *Some of the terminology that refers to "electric conductivity" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…電位差をV,電極間の物質の長さをl,断面積をSとすれば,電流Iは, I=(σS/l)Vによって与えられる。ここでσは物質によって決まる固有の量で,電気伝導度electric conductivity(電気伝導率,導電率などともいう)と呼ばれ,比抵抗の逆数に等しい。物質中の電場V/lが小さいときには,σは一定となり電流Iと電位差Vは比例する。… ※「electric conductivity」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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