導体

• 読み: どうたい
• ローマ字: dōtai
• 漢字の分解: 導 (dō/michibi-) — guide, conduct, lead; 体 (tai/karada) — body, substance
• 発音: /doː.ta.i/

意味

Conductor; a material that allows the flow of electric current with little resistance. Commonly refers to metals such as copper, silver, and aluminium.

A noun contrasted with 絶縁体 (insulator) and 半導体 (semiconductor). Good conductors have many free electrons that move easily under an electric field. In thermodynamics, 熱伝導体 (thermal conductor) describes materials that conduct heat well. The term appears in fundamental physics education and in electrical engineering contexts.

例文

1. 金属は自由電子が豊富なため電気の良い導体として機能する。
2. 導体と絶縁体の本質的な違いは電子の移動しやすさ、すなわちバンド構造にある。
3. 銅は優れた導体であるため、電気配線や変圧器の巻き線に広く使われている。

使い方ガイド

場面: physics, electrical engineering, electronics, education

トーン: neutral

起源と歴史

Compound of 導 (dō — to guide, lead, conduct) and 体 (tai — body, substance). A conductor is literally 'a substance that leads [electricity]'.

文化的背景

時代: Modern

世代: Students and professionals

社会的背景: Technical