Um fio linhas vermelhas se conecta a duas placas de metal que se encostam, formando um circuito. Vamos usar como exemplo um transformador ideal. Let us think of the mutual action between a magnet and a conductor.
Lei de Faraday e Lenz - indução eletromagnética - Magnetismo
The observed phenomena in this case depend only on the relative motion of the conductor and the magnet, while according to the usual conception, a distinction must be made between the cases where the one or the other of the bodies is in motion.
If, for example, the magnet moves and the conductor is at rest, then an electric field of certain energy-value is produced in the neighbourhood of the magnet, which excites a current in those parts of the field where a conductor exists.
Examples of a similar kind such as the unsuccessful attempt to substantiate the motion of the earth relative to the "Light-medium" lead us to the supposition that not only in mechanics, but also in electrodynamics, no properties of observed facts correspond to a concept of absolute rest … ".
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American Journal of Physics 41 5 : — Einstein and H. Consultado em 9 de janeiro de Categorias ocultas:! Noutros projetos Wikimedia Commons.