Show that a current carrying loop acts as a magnetic dipole. Derive an expression for its magnetic dipole moment?

Derive an expression for the magnetic dipole moment of an atom.

A current loop behaves as a mgnetic dipole. Obtain expression for magnetic dipole moment of a current loop.

Define the term magnetic dipole moment.

Explain how an atom behaves as a magnetic dipole. derive an expression for the magnetic dipole of the atom. Also define Bohr magneton.