Problem 3.360

A large plate of non-ferromagnetic material moves with a constant velocity \(v=90 \mathrm{~cm} / \mathrm{s}\) in a uniform magnetic field with induction \(B=50 \mathrm{mT}\) as shown in Fig. \(3.98 .\) Find the surface density of electric charges appearing on the plate as a result of its motion.