V2EX induced current

Induced Current

Definition / 定义

感应电流:由于磁通量发生变化(例如磁场强弱变化、线圈与磁体相对运动等)而在导体中产生的电流。常见于发电机、变压器与电磁感应实验中。(在一些语境下也可泛指“被诱发产生的电流”。)

Pronunciation / 发音

/ndjust krnt/ (美式常见也作 /ndust knt/)

Examples / 例句

When the magnet moves, an induced current flows in the coil.
当磁体移动时,线圈中会产生感应电流。

In Faraday’s experiment, changing the magnetic field through a loop creates an induced current whose direction depends on the change.
在法拉第的实验中,穿过线圈的磁场发生变化会产生感应电流,而电流方向取决于这种变化的方向。

Etymology / 词源

induced 来自拉丁语 inducere,意为“引入、引起”,在科学语境中发展为“由外因导致产生的(效应)”;current 来自拉丁语 currere “奔跑、流动”,在物理中用于表示“电的流动”。合起来 induced current 即“由变化的磁场等因素引起的电流”。

Related Words / 相关词

Literary Works / 文学作品

  • Michael Faraday, Experimental Researches in Electricity(《电学实验研究》)
  • Richard P. Feynman, The Feynman Lectures on Physics(《费曼物理学讲义》)
  • David J. Griffiths, Introduction to Electrodynamics(《电动力学导论》)
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