PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
In an experiment, electrons are accelerated from rest by applying a voltage of 500 V. Calculate the radius of the path if a magnetic field of 100 mT is then applied. [Charge of the electron = 1.6×10−19 C, Mass of the electron = 9.1×10−31 kg]
(1) 7.5×10−3 m
(2) 7.5×10−2 m
(3) 7.5 m
(4) 7.5×10−4 m