An electron enters a region of uniform magnetic field that is directed perpendicular…
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
An electron enters a region of uniform magnetic field that is directed perpendicular to the plane of the page and into it. The electron’s velocity is towards the right in the plane of the page. What is the direction of the magnetic force acting on the electron at that instant?
(a) Upward in the plane of the page
(b) Out of the page toward the observer
(c) Downward in the plane of the page
(d) No magnetic force acts on the electron