Practicing Success
A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, then what is the shape of the trajectory of electrons? |
straight line parabolic elliptical circular |
circular |
A charged particle moving perpendicular to an external uniform magnetic field moves in a circular orbit whose centripetal acceleration is provided by the magnetic force given by mv2/r = qvB |