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Arago's rotations : ウィキペディア英語版 | Arago's rotations Arago's rotations is an observable phenomenon and effect discovered by François Arago in 1824. In the effect, as a copper disc is rotated in its own plane, and if a magnetic needle be freely suspended on a pivot over the disc, the needle will rotate with the disc. On the other hand if the needle is fixed it will tend to retard the motion of the disc. ==See also==
* Faraday effect * Induction motor * History of electromagnetism
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Arago's rotations」の詳細全文を読む
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