Question: A beam of protons is accelerated easterly from rest through a potential difference of 3.0 kV. It enters a region where there exists an upward

A beam of protons is accelerated easterly from rest through a potential difference of 3.0 kV. It enters a region where there exists an upward pointing uniform electric field. This field is created by two parallel plates separated by 10 cm with a potential difference of 250 V across them.
(a) What is the speed of the protons as they enter the electric field?
(b) Find the magnitude and direction relative to the velocity of the magnetic field (perpendicular to E-bar) needed so the beam passes undeflected through the plates.
(c) What happens to the protons if the magnetic field is greater than the value found in part (b)?

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a Energy conservation gives eV mv 2 Solving for v we get b To balance ... View full answer

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