Displacement current

Japanese: 変位電流 - へんいでんりゅう（英語表記）displacement current

A current that occurs based on the time change in electric flux density D , whether in a vacuum or in a material. It is expressed as ∂ D /∂ t . It is also called electric flux current and was introduced by JC Maxwell in the process of generalizing Ampere's law. It is a different current from the conduction current, which is based on the movement of charge in a conductor, and can also cause electromagnetic waves. In a circuit that includes a capacitor, the conduction current and displacement current are continuous, and only the displacement current flows between the two poles of a capacitor. The existence of displacement current can be experimentally proven by measuring the electromotive force induced in a coil placed between the two poles of a capacitor connected to an AC power source.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

真空，物質中を問わず電束密度 D の時間変化に基づいて発生する電流。∂D/∂t で表される。電束電流ともいい，アンペールの法則を一般化する過程で J.C.マクスウェルにより導入された。導体中などにおける電荷の移動に基づく伝導電流とは異なった電流で，電磁波の原因にもなる。コンデンサを含む回路では伝導電流と変位電流とは連続し，コンデンサの両極間では変位電流だけが流れる。交流電源につないだコンデンサの両極間に置かれたコイルに誘導される起電力を測定することにより変位電流の存在を実験的に証明できる。

出典　ブリタニカ国際大百科事典小項目事典ブリタニカ国際大百科事典小項目事典について　情報

<<: Benen - Benen

>>: Eliezer Ben‐Yehuda