An electron with a speed of 5000 m/s enters the region between a set of parallel plates. The plates are 0.04 m apart, and have a potential difference of 400 volts. The potential difference creates a uniform electric field directed down, as shown.
To ensure that the electron passes through the plates without being deflected, a magnetic field can be introduced in the region between the plates. If this magnetic field is perpendicular to the electron's velocity, what is the magnitude and direction of the field?
Next problem : B - An electron in a magnetic field.
List of problems related to test 2.
Created by Andrew Duffy, Boston University Physics Department.
Last update July 21, 1998