An electron is released from rest and allowed to accelerate through a uniform potential difference of 400V in a cathode-ray tube. Neglect relativistic effects. The electron has mass me=9.11×10−31kg and charge e=1.60×10−19C.
(a) Calculate the speed of the electron after it has traversed the potential difference.
(b) Determine the kinetic energy of the electron at that point, expressing your answer in electronvolts and in joules.