Proton A travels northward with a constant velocity.Due north of proton A is proton B,traveling to the east at a different constant velocity.In what direction is the magnetic force on A?
A)to the south
B)to the west
C)upward,out of the ground
D)down into the ground

Question

Quizplus · Accepted Answer

Since proton B is moving to the east and the magnetic force is perpendicular to both the direction of motion and the magnetic field, the magnetic force on proton A will be perpendicular to the northward direction of A and the eastward direction of B, which is to the west.

Proton a Travels Northward with a Constant Velocity