A metal strip 6.50 cm long 0.850 cm wide, and 0.760 mm thick moves with constant velocity

Question:

A metal strip 6.50 cm long 0.850 cm wide, and 0.760 mm thick moves with constant velocity v through a uniform magnetic field B = 1.20mT directed perpendicular to the strip , as shown in Figure. A potential difference of 3 .90μV is measured between points x and y across the strip. Calculate the speed v.