Q.
From the figure describing photoelectric effect we may infer correctly that
A) Na and Al both have the same threshold frequency
B) Maximum kinetic energy for both the metals depend linearly on the frequency
C) The stopping potentials are different for Na and Al for the same change in frequency
D) Al is a better photo sensitive material than Na
Explanation
(b) The graph between stopping potential and frequency is a straight line, so stopping potential and hence, maximum kinetic energy of photoelectrons depends linearly on the frequency.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.