A circular loop of wire with a radius of 20 cm lies in the xy plane and carries a current of 2 A, counterclockwise when viewed from a point on the positive z axis. Its magnetic dipole moment is: A. 0.25
A · m2, in the positive z direction
B. 0.25 A · m2, in the negative z direction
C. 2.5 A · m2, in the positive z direction
D. 2.5 A · m2, in the negative z direction
E. 0.25 A · m2, in the xy plane
