31(b)] become exact for a
point magnetic dipole The results obtained above can be shown to apply to any planar loop:
a planar current loop is equivalent to a magnetic dipole of dipole moment
m = I A, which is the analogue of electric dipole moment p Note, however,
a fundamental difference: an electric dipole is built up of two elementary
units — the charges (or electric monopoles) In magnetism, a magnetic
dipole (or a current loop) is the most elementary element