A Proton Moving Eastward with a Velocity of 5

Multiple Choice

A proton moving eastward with a velocity of 5.0 km/s enters a magnetic field of 0.20 T pointing northward.What are the magnitude and direction of the force that the magnetic field exerts on the proton? (e = 1.60 × 10^-19C)

A) 0 N
B) 1.6 × 10^-16 N upwards
C) 1.6 × 10^-16 N downwards
D) 1.1 × 10^-16 N eastwards