Define the term: magnetic dipole moment of a current loop. Write the expression for the magnetic moment when an electron revolves at a speed v around an orbit of radius r in hydrogen atom.

Explanation

The product of the current in the loop to the area of the loop is the magnetic dipole moment of a current loop.
The magnetic moment of electron
`bar(mu)= - (e )/(2) (overset(to) (r ) xx overset(to) (v) ) = - (e )/(2m_(0)) (overset(to)(r ) xx overset(to) (p) )=- (e)/(2m_(0)) overset(to)(l)`