Halliday, Resnick & Walker — Magnetic Fields: Problem 47

47 A strip of copper \(75.0\text{ }\mu\text{m}\) thick and \(4.5\text{ mm}\) wide is placed in a uniform magnetic field \(\vec{B}\) of magnitude \(0.65\text{ T}\), with \(\vec{B}\) perpendicular to the strip. A current \(i = 57\text{ A}\) 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 carriers per unit volume for copper is \(8.47 \times 10^{28}\text{ electrons/m}^3\).)