Question

Which one of the following graphs represent correctly the variation of photoelectric current (i) with the intensity (I) of incident radiations?

(1) A 

(2) B 

(3) C 

(4) D

Answer 1

Correct option : (2)

Explanation:

With the increase of intensity of incident light, the number of photons striking the emitter surface per unit area per unit time increases. As each photon colliding and emitting one electron, the number of emitted electrons increases with increase in the increase of intensity of light. The graph in option (2) is representing this fact and therefore is the correct answer.