Question

In a photoelectric effect experiment potential difference between plates increases keeping the incident light on the cathode plate remains unchanged which is correct about saturation current :

Answer 1

In a photoelectric effect experiment potential difference between plates increases keeping the incident light on the cathode plate remains unchanged.

To check : saturation current ...

1. increases
2. decreases
3. remains same
4. first increase then decreases

solution : in photoelectric effect experiment, potential difference between plates increase keeping the incident light on the cathode plate remains unchanged, photoelectric current is found to increase with the increase in potential difference across the plates.

further increasing photoelectric current, reaches saturation point for a given voltage across the plates. but after reaching saturation point, photoelectric current never increases further with the increase in potential difference. it remains same.

Therefore the correct choice is option (3)