Magnetic FieldA metal wire of mass m slides without
friction on two horizontal rails spaced a distance d apart, as shown in
Fig. 32-36 below. The track lies in a vertical uniform magnetic field B.
A constant current i flows from the generator G along one rail, across
the wire, and back down the other rail. Find the velocity (speed and direction)
of the wire as a function of time, assuming it to be at rest at t=0.