A Flat Circular Loop of Wire of Radius 0 $\vec { B }$

Multiple Choice

A flat circular loop of wire of radius 0.50 m that is carrying a 2.0-A current is in a uniform magnetic field of 0.30 T.What is the magnitude of the magnetic torque exerted on the loop when the plane of its area is perpendicular to the $\vec { B }$ field?

A) 0.00 N ∙ m
B) 0.41 N ∙ m
C) 0.47 N ∙ m
D) 0.52 N ∙ m
E) 0.58 N ∙ m