An electron moves in a uniform magnetic field of 0.20 T, at 5.0 x 105 m/s. The magnetic force on it is a) 1.6 x 10-14 N b) 1.6 x 10-14 N [perpendicular to the velocity]
c) 1.6 x 10-14 N [perpendicular to the field] d) not enough information given