Magnetic Materials

Magnetic dipole moment

Magnetic dipole moment is defined as the product of pole strength and the distance between the two poles.

Let a → distance between the poles also called magnetic length,

and m → strength of each pole.

Thus, magnetic dipole moment, pm is given as

pm = ma

 pm is vector quantity directed from south to north pole.

S.I units of pm are joule/tesla or ampere metre2.

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