On a fundamental minute scale iron, nickel and cobalt atoms have more electrons orbiting in one direction than the other. This means they produce little, tiny currents like electromagnets. With ferromagnetic things like iron, nickel and cobalt – these tend to like lining up into areas. Normally if you just take these areas, the north poles of these little areas will attract south poles of other little areas. They’ll all wind up going into circles and ovals in magnetism. If you put them in a strong magnetic field they’ll all line up. Normally with iron, if you take the magnetic field off, most of them will realign and then all the rest more randomly.
They get all jiggled up and end up pointing in random directions again. With very strong magnets, like rare earth magnets, the structure of the alloy tends to make it very hard to change the direction of the magnetic field. This means that more of them stay lines up, and you get a stronger magnet.
They get all jiggled up and end up pointing in random directions again. With very strong magnets, like rare earth magnets, the structure of the alloy tends to make it very hard to change the direction of the magnetic field. This means that more of them stay lines up, and you get a stronger magnet.
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Well, you first need to know how magnets work in the first place.
A magnet has many "domains". each domain is a tiny little compass. and each of those compasses create a tiny magnetic field. When all these domains are added up, you get a large magnetic field.
but for this adding up, all the domains have to be pointed in the same direction. if they're not, then you have a random pointing domain set which reduces the strength of the magnet because all those tiny magnetic fields are in different directions, and some fields cancel each other out. so if you can align all the domains in one particular direction, you'll have a much stronger magnet.
How do you do that? simple. with an external magnetic source. you just use the coil to induce a magnetic field in a steel piece. obviously, then, there is a maximum to which you can go to in terms of magnetic strength for a given piece of steel. because the number of domains is not infinite.
A magnet has many "domains". each domain is a tiny little compass. and each of those compasses create a tiny magnetic field. When all these domains are added up, you get a large magnetic field.
but for this adding up, all the domains have to be pointed in the same direction. if they're not, then you have a random pointing domain set which reduces the strength of the magnet because all those tiny magnetic fields are in different directions, and some fields cancel each other out. so if you can align all the domains in one particular direction, you'll have a much stronger magnet.
How do you do that? simple. with an external magnetic source. you just use the coil to induce a magnetic field in a steel piece. obviously, then, there is a maximum to which you can go to in terms of magnetic strength for a given piece of steel. because the number of domains is not infinite.
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Because some magnets have higher % of magnetic substances inside of the magnet.
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They aite there vegetables