An electron, initially at rest, is accelerated through a potential difference of 2.50 MeV, thereby increasing its total energy by 2.50 MeV. The speed of the electron is

Question

Quizplus · Accepted Answer

The energy gained by the electron is 2.50 MeV, which is its kinetic energy. Using the relativistic energy-momentum relation, the speed corresponding to this energy is approximately 0.986 c.

An Electron, Initially at Rest, Is Accelerated Through a Potential