Maple Exercise III
Two charged plates are 4 cm long, and separated by 2 cm. The end of the plate is 12 cm from the screen. An electron is projected along the axis midway between the plates of a cathode-ray tube with an initial velocity of 2 x 107 m s -1. The uniform electric field between the plates has an intensity of 20,000 N C-1 and is upward. (a) How far below the axis has the electron moved when it reaches the end of the plates? (b) At what angle with the axis is it moving as it leaves the plates? (c) How far below the axis will it strike the fluorescent screen S?