A Loop of Wire with a Weight of 0

A loop of wire with a weight of 0.55 N is oriented vertically and carries a current I = 2.25 A. A segment of the wire passes through a magnetic field directed into the plane of the page as shown. The net force on the wire is measured using a balance and found to be zero. What is the magnitude of the magnetic field?

A) zero tesla
B) 0.51 T
C) 0.84 T
D) 1.2 T
E) 4.5 T