PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A proton of mass m, accelerated through a potential difference V, enters a uniform electric field between the parallel plates of a capacitor. It enters parallel to plates of length l, midway between them. The field strength varies with time as E=at, where a is a positive constant. Find the angle of deviation of the proton as it leaves the capacitor. Assume that it does not collide with either plate.