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Do two magnets separated by a distance have potential energy relative 
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#1
May2314, 09:20 PM

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To each other??? Repondez!



#2
May2314, 09:43 PM

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You should be able to figure that out  what is the definition of potential energy?



#3
May2314, 09:59 PM

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Kkkkkkk



#4
May2314, 10:17 PM

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Do two magnets separated by a distance have potential energy relative
And here is a lab for you to do: http://physics.bu.edu/ulab/intro1/magnetic.pdf 


#5
May2314, 10:20 PM

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Ok so here is something I don't understand. I've had electricity and magnetism course but I never learned of any such thingn. Why not? Is this stuff told of later on? 


#6
May2314, 10:46 PM

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What level was the course taught at? Your course on magnetism should also have taught you about magnetic forces. If those bits are there, you should have been able to figure it out. You should have learned that the potential energy of a system is the amount of work needed to get it into that configuration. You should have equations for the force between two magnets, and an equation for work, and so on. The course may not have covered magnetic potential energy because the fundamentals had already been taught. After all, how much time will you have for the exam? 


#7
May2314, 11:08 PM

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Unfortunately I am not sure how to calculate the force between two magnets, only between mag fields and wires 


#8
May2314, 11:26 PM

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It's similar  permanent magnets are more complicated than bits of wire.
You are learning the situations for simple geometries so the maths is easier. i.e. if you have two bar magnets length L which are separated by a distance D>>L, then you can use the magnetic dipole equation. http://en.wikipedia.org/wiki/Force_between_magnets But you can easily tell that there must be a "magnetic potential energy" because you have to do work to push two like poles close to each other. You can get two magnets and measure it. 


#9
May2314, 11:30 PM

P: 62

Yeah I mean I was sure there was a pot energy between them but I didn't know the force between them so I couldn't calculate the pot energy between them. Are these equations created empirically? 


#10
May2314, 11:34 PM

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Also I've read the whole giancoli physics based on calc 3 and I've never run into forces between permanent magnets. 


#11
May2414, 12:22 AM

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People who make magnets for a living need to be able to predict how stronga magnet they'll get from a particular process. I think this is a college level field of materials engineering. You should have had a little bit on how permanent magnets work, at least in terms of "magnetic domains". There should also be a bit of maths about a magnetic dipole field ... this is the field due to a very small current loop. You can see the analogy between that and the field due to a permanent magnet. 


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