A Circular Coil (Radius = 0

Multiple Choice

A circular coil (radius = 0.40 m) has 160 turns and is in a uniform magnetic field. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.16 N ⋅ m when the current in the coil is 4.0 mA. What is the magnitude of the magnetic field?

A) 0.37 T
B) 1.6 T
C) 0.50 T
D) 1.2 T
E) 2.5 T