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- Thread starter ZecronTech
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- #2

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Hint: The magnetic field B by a given pole of a bar magnet at a point (assume unit north pole) r cm away from its centre is given by,

B= (μ

Where q

Hence classically the force between two poles of bar magnet is defined by

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Hence classically the force between two poles of bar magnet is defined byF=Bq_{m}. This formula is valid if the poles are mere points.

So what if the poles aren't points like in the example that I gave. Suppose the magnets facing each other are circular. Would the difference between points and a circle area of 3cm

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- #5

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Yup I was also thinking the same, although I don't know how to do it. It's a bit above my math level.

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http://en.wikipedia.org/wiki/Maxwell_stress_tensor#Magnetism_only

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