Define stopping potential (cut-off potential) with reference to photoelectric effect.


Stopping potential or cut-off potential is defined as the required potential for stopping the removal of an electron from a metal surface when the incident light energy is greater than the work potential of the metal on which the incident light is focused.
  • Stopping potential does not depend on the intensity of incident radiation. On increasing intensity, the value of saturated current increases, whereas the stopping potential remains unchanged.
  • For a given intensity of radiation, the stopping potential depends on the frequency. Higher the frequency of incident light higher the value of stopping potential.

Was this answer helpful?


4.5 (27)

Upvote (21)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *




Free Class