What is the effect of increasing the intensity of light that falls on the emitter in a photoelectric effect apparatus?

Question

What is the effect of increasing the intensity of light that falls on the emitter in a photoelectric effect apparatus? (A) Cut-off frequency decrease (B) Stopping potential decrease (C) Time delay for emission of photoetectron decrease (D) Saturation photocurrent increases

Tardigrade Admin · Accepted Answer

Intensity cannot change the cut off frequency or stopping potential. High intensity means more number of photons, so chances of hitting to electron by them increase and hence more photoelectron are emitted i.e., photocurrent increases.

Q. What is the effect of increasing the intensity of light that falls on the emitter in a photoelectric effect apparatus?

Cut-off frequency decrease

Stopping potential decrease

Time delay for emission of photoetectron decrease

Saturation photocurrent increases

Intensity cannot change the cut off frequency or stopping potential. High intensity means more number of photons, so chances of hitting to electron by them increase and hence more photoelectron are emitted i.e., photocurrent increases.