The angular momentum of a mass distribution where a differential element particle of mass m with velocity v and locatedat position r is defined in the formL =dmr x v =dvpr x v,p= nmwhere n is the number of particles per unit volume and m is its mass. If each of the particles has a charge q, with theirmovement they constitute a currentJ = nqvShow that the relationship between the magnetic dipole moment and the angular momentum isLm =2mwhere the magnetic moment is definedm =dvr x J

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