Question

In various experiments on photo electricity, the stopping potential for a given frequency of the incident radiation is ______.

Options

• inversely proportional to radiation intensity

• proportional to radiation intensity

• proportional to square of radiation intensity

• independent of the radiation intensity

Answer 1

In various experiments on photo electricity, the stopping potential for a given frequency of the incident radiation is independent of the radiation intensity.

Explanation:

The stopping potential is defined as the energy required to prevent any electron, even the most energetic, from reaching the other plate. Only the number of released electrons changes when the radiation intensity is changed; their kinetic energy remains unchanged.