Electrons are emitted at A with a velocity u at the angle into the space between

Electrons are emitted at A with a velocity u at the angle θ into the space between two charged plates. The electric field between the plates is in the direction E and repels the electrons approaching the upper plate. The field produces an acceleration of the electrons in the E-direction of eE/m, where e is the electron charge and m is its mass. Determine the field strength E which will permit the electrons to cross one-half of the gap between the plates. Also fi nd the distance s.

Transcribed Image Text:

E b/2 Electron path b/2 9. Electron source Problem 2/71