How much kinetic energy does the electron gain?
To determine the amount of kinetic energy gained by an electron, we need to know the initial and final velocities of the electron. The formula to calculate kinetic energy is given by:
Kinetic Energy (KE) = (1/2) * mass * velocity^2
However, without the specific information about the system and the initial and final velocities of the electron, it is impossible to determine the amount of kinetic energy gained.