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I would like to know if using two pairs of magnets with like poles side by side will strengthen the magnetic field?

As I understand, placing 2 pair of magnetic with like poles side by side will dry off the magnetism of both magnet.

Can anyone help to provide some input on this. Thanks.

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  • $\begingroup$ That's a misconception $\endgroup$ – UKH May 16 '16 at 12:54
  • $\begingroup$ A bar magnet is made up of lots of microscopic atomic magnets, each with a very weak magnetic field, all pointing the same direction. Does this answer your question? $\endgroup$ – Peter Shor May 16 '16 at 13:37
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    $\begingroup$ @Unnikrishnan: what's a misconception? The first sentence or the second? $\endgroup$ – Peter Shor May 16 '16 at 13:38
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    $\begingroup$ "As I understand, placing 2 pair of magnetic with like poles side by side will dry off the magnetism of both magnet." $\endgroup$ – UKH May 16 '16 at 13:53
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Yes. Electricity and magnetism obeys something called the principle of superposition which means that the fields from different objects can just be added together to find the new, resulting field. This related question says more about why this happens.

A permanent bar magnet is produced when the magnetic fields of countless individual atoms are aligned inside a metal so that they superpose (add together) constructively to produce a stronger, macroscopic field. So adding to magnets together, in the same orientation, is an extension of the same idea.

Often, in practice, putting magnets together doesn't make a much stronger field, and that's because the magnetic fields from each separate magnet decrease in strength farther away from them --- so the added field isn't as strong as each individual field. If you placed 10 magnetics side-by-side, you probably wouldn't notice the enhancement from the ones farthest apart.

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