Question

19. Draw the graphs showing the variation of photoelectric current with anode potential of a photocell
for (a) the same frequency but different intensities I, > I > Iz of incident radiation, (b) the same
intensity but different frequencies v, > v2 > v, of incident radiation. Explain why the saturation current
is independent of the anode potential.​

Answer 1

Answer:

Curves 1 and 2 correspond to similar materials while curves and 4 represent different materials, since the value of stopping potential for 1,2 and 3, 4 are the same,For the given frequency of the incident radiation, the stopping potential is independent of its intensity

So, the pairs of curves (1 and 3) and (2 and 4) correspond to different materials but same intensity of incident radiations.