A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of,
(i) an equilateral triangle of side 'a'.
(ii) a square of side 'a'.
The magnetic dipole moments of the coil in each case respectively are :
(1) √3Ia2 and 3Ia2
(2) 3 Ia2 and Ia2
(3) 3 Ia2 and Ia2
(4) 4 Ia2 and 3 Ia2