le 15.1 A beam of electrons passes undeflected through a 0.50-T magnetic field combined with a 50-kN/C electric field. The electric field, the magnetic field, and the velocity of the electrons are all perpendicular to each other. How fast are the electrons travelling? Given E = 50 KN/C = 5.0 X 104 N/C |B = 0.50 T Required