A strip of copper 140 µm thick and 4.20 mm wide is placed in a uniform magnetic field of magnitude B = 0.84 T, that is perpendicular to the strip. A current i = 28 A is then sent through the strip such that a Hall potential difference V appears across the width. Calculate V (in V). (The number of charge carriers per unit volume for copper is 8.47 x 1028 electrons/m3.)