In a photoelectric effect experiment the stopping potential is:
A)the energy required to remove an electron from the sample
B)the kinetic energy of the most energetic electron ejected
C)the potential energy of the most energetic electron ejected
D)the photon energy
E)the electric potential that causes the electron current to vanish

Question

Quizplus · Accepted Answer

The stopping potential is the electric potential that is applied to the sample to stop the flow of electrons. This is the point at which the kinetic energy of the electrons is equal to the potential energy of the electrical field. Therefore, the correct choice is E, which describes the electric potential that causes the electron current to vanish. The other choices describe other aspects of the photoelectric effect, but they are not directly related to the stopping potential.

In a Photoelectric Effect Experiment the Stopping Potential Is