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nada muito importante. estou apenas procurando, alguma liga metálica (provavelmente de magnetismo nulo) cuja simples passagem no campo magnético (entre um imã e o atrator) anule tal efeito.biopower Escreveu:poderias explicar um bocadinho melhor o que pretendes?
cumprimentos
#magnetic fields are related to what are call magnetic flux lines. these magnetic flux lines extend unbroken from north magnetic poles to south magnetic poles. where the flux lines are close together, the magnetic field is strong. thus to avoid magnetic fields, you need to keep magnetic flux lines away. because magnetic flux lines can't be broken, they can't simply be made to disappear. to "stop" a magnetic field in a particular region of space, you have to either terminate the flux lines at a magnetic pole or you have to divert the flux lines away the region that you're interested in. the first strategy has a problem: no isolated magnetic poles (so-called "magnetic monopoles") have ever been found. that means that every north pole you find has a south pole attached to it. thus you can't simply end the flux lines with magnetic poles because for each flux line you end with a south pole, you'll start a new one with the attached north pole. but the second strategy is reasonable. there are many materials that divert magnetic flux lines. one of the most important of these is a metal called "mu metal," an alloy that's made from nickel, iron, chromium, and copper. mu metal attracts flux lines. it draws flux lines through itself so that if you were to wrap yourself in a layer of mu metal, any magnetic flux lines that would have gone through you (and thus exposed you to magnetic fields) will go through the mu metal instead. mu metal and similar alloys are used routinely to shield objects that can't tolerate magnetic fields.
ferro e outras ligas do mesmo também servem, são é menos eficientes por terem uma menor permeabilidade (provavelmente terão que ter maior espessura que o mu para fazer o mesmo trabalho).blueskyh20 Escreveu:a resposta é o mu-metal. fique bem.
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editado: haverá alguma relação entre este fenómeno e e=mc2?what blocks magnetic fields?
there is no known material that blocks magnetic fields without itself being attracted to the magnetic force. magnetic fields can only be redirected, not created or removed. to do this, high-permeability shielding alloys are used. the magnetic field lines are strongly attracted into the shielding material.
ajosemor Escreveu:em resumo, pode-se dizer: não há isolantes para os campos magnéticos. a única maneira de evitar que atravessem um determinado espaço é criar uma gaiola á sua volta, em material com boa permeabilidade magnética, que desvia as linhas do campo oferecendo um caminho mais fácil.
saudações
relação com uma teoria? definitivamente não, porém equiparação com as leis da termodinâmica sim.subrisum Escreveu:
editado: haverá alguma relação entre este fenómeno e e=mc2?
até mais!
esse metal seria interessante , porem precisamos saber se o campo magnético permite a sua livre passagem. como já disse , transitar anulando o campo.bluesky Escreveu:a resposta é o mu-metal. fique bem.
http://en.wikipedia.org/wiki/mu-metal
http://www.lessemf.com/mag-shld.html
#magnetic fields are related to what are call magnetic flux lines. these magnetic flux lines extend unbroken from north magnetic poles to south magnetic poles. where the flux lines are close together, the magnetic field is strong. thus to avoid magnetic fields, you need to keep magnetic flux lines away. because magnetic flux lines can't be broken, they can't simply be made to disappear. to "stop" a magnetic field in a particular region of space, you have to either terminate the flux lines at a magnetic pole or you have to divert the flux lines away the region that you're interested in. the first strategy has a problem: no isolated magnetic poles (so-called "magnetic monopoles") have ever been found. that means that every north pole you find has a south pole attached to it. thus you can't simply end the flux lines with magnetic poles because for each flux line you end with a south pole, you'll start a new one with the attached north pole. but the second strategy is reasonable. there are many materials that divert magnetic flux lines. one of the most important of these is a metal called "mu metal," an alloy that's made from nickel, iron, chromium, and copper. mu metal attracts flux lines. it draws flux lines through itself so that if you were to wrap yourself in a layer of mu metal, any magnetic flux lines that would have gone through you (and thus exposed you to magnetic fields) will go through the mu metal instead. mu metal and similar alloys are used routinely to shield objects that can't tolerate magnetic fields.