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
\(\frac{{\rm{m}}}{{\rm{\pi }}}\)
2
\(\frac{{3{\rm{m}}}}{{\rm{\pi }}}\)
3
\({\rm{\;}}\frac{{2{\rm{m}}}}{{\rm{\pi }}}\)
4
\({\rm{\;}}\frac{{4{\rm{m}}}}{{\rm{\pi }}}\)