7. In a television set, electrons are accelerated from rest through a potential difference of 15 kV. The electrons then pass through a 0.35 T uniform magnetic field, which is perpendicular to the velocity. The electrons are deflected to the appropriate spot on the screen. What is the magnetic force on each of these electrons? a) 1.3 x 10-10 N melec -4x 10 - 31 b) 10 x 10 2 N c) 4.0 x 10-12 N d) 3.0 x 10 4 N zero