Question

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 $Na$.

Answer 1

Answer: (B)

Maximum kinetic energy for both the metals depend linearly on the frequency

Answer 2

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