A charge q is spread uniformly over an insulated loop of radius r. If it is rotated with an angular velocity `omega` with respect to normal axis then the magnetic moment of the loop is :
A. `(4)/(3)" q"omegar^(2)`
B. `(3)/(2)" q"omegar^(2)`
C. `"q"omegar^(2)`
D. `(1)/(2)" q"omegar^(2)`