Question

The figure shows a plot of three curves a, b, c showing the variation of photocurrent vs. collector plate potential for three different intensities I₁ , I₂ and I₃ having frequencies n₁ , n₂ and n₃ respectively incident on a photosenitive surface. Point out the two curves for which the incident radiations have same frequency but different intensities. 

Answer 1

Curves a and b have different intensities but same stopping potential, so curves ‘a’ and ‘b’ have same frequency but different intensities.