Question

Why photoelectric current does not increase on increasing the positive potential?

Answer 1

Explanation:

cuz amount of photoelectric current depends upon the intensity of the incident radiation and it is independent of potential and in a sense if you increase positive potential it doesn't cause the electrons to break the forces holding it in the atom of the metal.

Answer 2

The photoelectric current attains a saturation value and does not increase further for any increase in the positive potential. The saturation current increases with the increase of the light intensity.