An Electron Moves with a Speed of 3

An electron moves with a speed of 3.0 × 10⁴ m/s perpendicular to a uniform magnetic field of 0.40 T. What is the magnitude of the magnetic force on the electron?

A) 4.8 × 10^-14 N
B) 1.9 × 10^-15 N
C) 5 × 10^-20 N
D) 2.2 × 10^-24 N
E) zero