Question

Magnetic flux density at a distance r from a magnetic dipole

Answer 1

A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions[clarification needed] of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not perfect. In particular, a magnetic monopole, the magnetic analogue of an electric charge, has never been observed. Moreover, one form of magnetic dipole moment is associated with a fundamental quantum property—the spin of elementary particles.

A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions[clarification needed] of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not perfect. In particular, a magnetic monopole, the magnetic analogue of an electric charge, has never been observed. Moreover, one form of magnetic dipole moment is associated with a fundamental quantum property—the spin of elementary particles.The magnetic field around any magnetic source looks increasingly like the field of a magnetic dipole as the distance from the source increases.

Answer 2

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.