A Flat Circular Coil of Wire Having 200 Turns and Diameter

Multiple Choice

A flat circular coil of wire having 200 turns and diameter 6.0 cm carries a current of 7.0 A. It is placed in a magnetic field of $0.60 \mathrm {~T}$ with the plane of the coil making an angle of 30° with the magnetic field. What is the magnitude of the magnetic torque on the coil?

A) 2.1 N ∙ m
B) 1.2 N ∙ m
C) 3.9 N ∙ m
D) 5.4 N ∙ m
E) 1.0 N ∙ m