Answer to Question #70617 in Quantum Mechanics for Rashid

Question

What happen when electron gently released in electric field

Answer 1

If the electron moves in a direction that coincides with the direction of the electric field vector E, then the direction of displacement will be opposite to the force acting on the electron, and it will expend the previously acquired kinetic energy. Thus, the electron can move towards the action of the field only if it has a certain initial velocity, that is, some reserve of kinetic energy.
In this case, the motion of the electron will be uniformly decelerated (the braking electric field), and when the kinetic energy of the electron is completely consumed (that is, the kinetic energy is completely transformed into a potential one), the electron stops and starts moving uniformly in the direction of the force F.