PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
In an experimental setup, a uniform magnetic field of magnitude 0.020T is produced in a region that is 6.0cm long. A beam of protons, each of kinetic energy 3.0keV, is directed into this region such that the initial velocity of the protons is perpendicular to both the magnetic field and a simultaneously applied uniform electric field E. The aim is to make the protons pass through the region without deflection.
(i) Calculate the speed of the protons corresponding to the given kinetic energy.
(ii) Determine the magnitude of the electric field that must be applied so that the protons travel straight through the region. State the direction of E relative to B for the desired outcome.