A north pole and south pole are seperated by some distance (positioned vertically).(adsbygoogle = window.adsbygoogle || []).push({});

Using the discrete version of Ampere's law:

Take a path rectangle with one vertical side completely inside the magnetic field and the other vertical side completely outside the magnetic field.

Where h = height:

[tex]Bh = -\left[(B_{||}\Delta l)_{top} + (B_{||}\Delta l)_{bottom}\right][/tex]

So there is a magnetic field outside the line of the magnets' edge because the RHS doesn't equal 0? Why is the RHS negative?

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# Fringe effect

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