Magnetic field at any point due to a short magnetic dipole derivation
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A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions[clarification needed]
The magnetic field around any magnetic source looks increasingly like the field of a magnetic dipole as the distance from the source increases.
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Explanation:
Force and Torque on a Small Magnetic Dipole ... The dipole vector points along the z axis. ... or so the B field lies along one axis ... but we can't do both at once.
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