Explain effect of variation of intensity of incident radiation on photoelectric current.

Explanation

Collector (A=anode) is kept positive w.r.t emitter C(Cathode) hence electron emitted are attracted toward collector A.
By keeping frequency of incident radiation and voltage on collector constant intensity of incident radiation is changed and resulting photocurrent is measured.
Figure show graph obtained for intensity-photoelectric current.

Photoelectric current is proportional to number of photoelectrons emitted in one second which shows that no. of electrons emitted in one second.