magnets repelling
Is there a formula on the distance of repelling magnets, on how much they can liff.?
Say i used NdFeB magnets that were able to lift 2lb(2 of them), how much repelling distance, (include formula if you can)… Im trying to invent something using different reppeling strength of two magnets. Then i try to use larger or smaller magnets compared to there lift…… Second question, can two magnets of different sizes repell each other.
If the magnets are free to rotate to be parallel to the local field,
the force between two magnets, say Magnet 1 and Magnet 2, varies as the
magnetic moment of Magnet 1 times the derivative of the field of Magnet
2. If the magnets are not free to rotate the situation is quite
diffrerent and a lot more complicated. Some vector calculus is needed.
At a distance large in comparason to the size of the magnets, the
field from Magnet 2 is an inverse cube. Hence the derivative (rate of
change) of the field is an inverse fourth power. This sort of drastic
distance dependance is outside ones usual experience and that is why
people get pinched when fooling with large NdFeB magnets.
just copied this from another site…hope it helps…
Repelling Magnets in Microgravity for educators
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Yellow Jacket Trap $6.99 Victor Yellow Jacket Magnet is easy to use, has no poisons, no mess, and the bait is included. All you have to do is add water to the bag and hang the trap in your problem area…. |
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THE EARTH IS A GIANT MAGNET $34.95 Demonstrates how the earth is a giant magnet and illustrates the basic principles of magnetism.This product is manufactured on demand using DVD-R recordable media. Amazon.com’s standard return policy will apply…. |
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Mosquito Magnet Octenol3 $13.99 The EPA registered Mosquito Magnet Octenol is a secondary attractant the mimics human breath, drawing mosquitoes and biting insects to the trap. Mosquito Magnet Octenol attracts most mosquito species, including salt marsh mosquitoes, as well as no-see-ums and black flies. It will lure biting insects to the Mosquito Magnet Trap where they are captured, then dehydrate and die. Increase your catch ra… |
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