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Sinopse: imagem esquemática mostrando a atração e a repulsão de cargas elétricas.
Fonte: "Charges repulsion attraction" by NEURO ⇌ - Own work. Licensed under Public domain via Wikimedia Commons.
URL: http://commons.wikimedia.org/wiki/File:Charges_repulsion_attraction.svg#mediaviewer/File:Charges_repulsion_attraction.svg
