Question

A proton moves from left to right across the screen at speed v0. Then a uniform magnetic field of strength 0.80 T is directed into the screen. What is the direction of the force on the proton?

Answer 1

Answer: The force is  directed upward

Explanation: Considering the Lorentz force, given by:

F= qv×B

using the right hand rule and considering the direction of electron velocity and the magnetic field from the figure, the vectorial product gives a  force vector upwards .