Question

In practical experiments of photo electric effect the total number of photo electrons coming out is less than 1% of the total number of photons falling on the plate.

Will the photo current increase on increasing intensity of the light source?

• A. True
• B. False

Answer 1

The correct option is A

True

If intensity is low, then less number of photons are hitting the screen , and 1% of the number of photons is the number of photo electrons that are coming out.

If intensity is high but same frequency of light then now the number of photons has increased, 1% of this will still be larger. So the total number of photo electrons and thereby the photo current will increase.