[b][color=#ff00ff][size=200]Il campo elettrico indotto[br][/size][/color][/b][br]Abbiamo visto che, ponendo un conduttore all’interno di un campo magnetico variabile,[b] è possibile generare una corrente elettrica indotta nel conduttore.[/b]In generale, quando una carica elettrica è in [br]accelerazione, su di essa agisce un campo elettrico; in questo caso, però, la corrente è indotta dal campo magnetico variabile. [br][br]Di conseguenza, [color=#ff0000]il campo elettrico [/color][color=#333333]non è generato dal movimento di cariche elettriche libere, ma [/color][b]anch’esso è indotto, generato cioè dal campo magnetico variabile.[/b]In particolare, le linee di campo magnetico sono perpendicolari a quelle del campo elettrico; il verso delle linee del campo elettrico, inoltre, dipende da come varia il campo magnetico: se il campo magnetico aumenta, le linee del campo elettrico hanno il verso definito dalla[b] legge di Lenz[/b], mentre se il campo magnetico diminuisce, esse hanno verso opposto.[br][br]Supponiamo, ad esempio, che una spira circolare sia posta all’interno di un campo magnetico variabile; in questo caso, le linee di campo elettrico indotto sono chiuse e di forma circolare, giacenti in un piano perpendicolare a quello delle linee di campo magnetico; il loro verso segue le regole viste in precedenza:[br][br][img]data:image/jpeg;base64,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[/img][br][br][b][size=200][color=#ff00ff][br]Il campo magnetico indotto[br][/color][/size][/b][br]Abbiamo visto che un campo magnetico variabile genera un campo elettrico indotto; tuttavia, il fisico scozzese James Clerk Maxwell scoprì che anche una variazione del flusso del campo elettrico genera un campo magnetico.[br]Anche in questo caso[color=#ff0000] le linee di campo magnetico[/color][color=#333333] sono perpendicolari a quelle del campo elettrico.[br][br][/color]Tuttavia, il verso delle linee di campo magnetico indotto segue delle regole differenti; [b]se il campo elettrico aumenta, le linee di campo magnetico hanno verso opposto a quello previsto nel caso del campo elettrico indotto; se, invece, il campo elettrico diminuisce, le linee di campo magnetico indotto hanno verso che si oppone al precedente.[br][br][/b]La forma delle linee di campo magnetico indotto è molto simile a quella delle linee del campo elettrico indotto:[br][br][br][img]data:image/png;base64,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[/img]