Chapter 11, Problem 108CP

A wire ismade into a circular shape of radius R and pivoted along a central support.The two ends of the sire are touching a banish that is connected to a &power source. The stricture is between the poles of a magnet such that we can assume there is a uniform magnetic field on the wire. In terms of a coordinate system with origin at the center ofthe ring, magneticfieldisB_x=B₀,B_y=B_z= 0. and the ring rotates about the z-axis. Find the torque on the ring siren it is not in the xz-plane.