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 m frequency
D) Al is a better photo sensitive material than Na.
Correct Answer: B
Solution :
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.
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