The graph shows the stopping potential for photoelectrons as a function of the f

Question

The graph shows the stopping potential for photoelectrons as a function of the frequency of the incident light for two different metals (C's and W's). Which of the following statements is true?

A) Because the intercepts are different, Planck's constant is not constant.
B) For a given frequency of incident light, the photoelectrons from W are more energetic than those from C's.
C) The maximum kinetic energy of the photoelectrons increases as the frequency of the incident light increases.
D) The stopping potentials for all metals are the same.
E)The threshold frequency for C's is greater than that for W.

C) 28.0 × 10-14 Cs f. Hz The graph shows the stopping potential for photoelectrons as a f the incident light for two different metals (Cs and W). Which of ti true?

Explanation / Answer

C) The maximum kinetic energy of the photoelectrons increases as the frequency of the incident light increases.

[ A is wrong because the slope is plank's constant, not the intercept, B is wrong because we can see C electrons produce more V thant W's for a given g ,D is wrong because we just now saw two metals having different Stopping potentials, E is wrong because C generated V for lesser f than W ]

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