A strip of copper 150m thick and 4.5 mm wide is placed in a uniform magnetic field

Question:

A strip of copper 150μm thick and 4.5 mm wide is placed in a uniform magnetic field B of magnitude 0.65 T, with E perpendicular to the strip. A current i = 23 A is then sent through the strip such that a Hall potential difference V appears across the width of the strip. Calculate V. (The number of charge carries per unit volume for copper is 8.47 x 1028 electrons/m3)