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Q & A: magnets with signatures

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Most recent answer: 04/16/2020
Q:
May take a couple of times asking in different variations, but I am wondering if there was a way to give a magnet a specific signature so you can �tune� other magnets to only be attracted to it once attuned to its signature?
- Michael Polignoni (age 32)
Port orchard, WA USA
A:

I guess you could make a magnet with a pattern of a large number of N and S poles on the surface. In fact, magnetic recording disks (hard drives) are something like that. Then a matching reversed pattern would be atracted once it was brought very close. Most other patterns would give very small forces.

Mike W.


(published on 04/16/2020)

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