At One Instant an Electron (Charge = -1

Multiple Choice

At one instant an electron (charge = -1.6 *10^-19C) is moving in the xy plane, the components of its velocity being v_x = 5.0 * 10⁵ m/s and v_y = 3.0 * 10⁵ m/s. A magnetic field of 0.80 T is in the positive x direction. At that instant the magnitude of the magnetic force on the electron is:

A) 0 N
B) 3.8 * 10^-14 N
C) 6.0 * 10^-14 N
D) 6.4 *10^-14 N
E) 1.0 *10^-14