An electron moves through a uniform magnetic field of magnitude with its velocity…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
An electron moves through a uniform magnetic field of magnitude 0.25T with its velocity making an angle of 60∘ with the field.
(i) Determine the magnitude of the magnetic force experienced by the electron when its speed is 3.0×107ms−1.
(ii) The magnetic field is increased by 20%, the speed of the electron is decreased by 10%, and the angle between its velocity and the field is reduced to 30∘. Calculate the new magnitude of the magnetic force.
(iii) Find the percentage change in the magnitude of the force relative to the value obtained in part (i).