Choose the correct option:
Figure shows a square current carrying loop `ABCD` of side `2m` and current` i=(1)/(2)A`. The magnetic moment `vec(M)` of the loop is

Explanation

`vec(DA)=-2cos30^(@)hati-2sin30^(@)hatk=(-sqrt3hati-hatk)vec(AB)=2hatj`
`thereforevecM=i(vec(DA)xxvec(AB))`
`=1/2[(-sqrt3hati-hatk)xx(2hatj)]=-sqrt3hatk+hati=(i=sqrt3hatk)A-m^(2)`