A square loop is carrying a steady current I and the magnitude of its magnetic dipole moment is m . If this square loop is changed to a circular loop and it carries the same current, the magnitude of the magnetic dipole moment of circular loop will be:\\
(1) $\frac { 4 m } { \pi }$\\
(2) $\frac { 3 m } { \pi }$\\
(3) $\frac { 2 m } { \pi }$\\
(4) $\frac { m } { \pi }$