Assume that a uniform magnetic field is directed into this page.If a proton is released with an initial velocity directed from the bottom edge to the top edge of the page,which of the following describes the direction of the resultant force acting on the proton?
A) into the page
B) to the left
C) to the right
D) out of the page

Question

Quizplus · Accepted Answer

The direction of the magnetic force on a charged particle moving through a magnetic field is given by the right hand rule. Point the thumb in the direction of the particle's velocity (top to bottom in this case) and the fingers in the direction of the magnetic field (into the page). The resulting force will be perpendicular to both, in this case to the left. Therefore, the correct choice is B, to the left.

Assume That a Uniform Magnetic Field Is Directed into This