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Slope of the stopping potential (or kinetic energy) versus frequency graph

This type of question, asked 3 times: 6 Apr 2023, 30 Jan 2024, 24 Jan 2025. All 3 questions below, oldest first.

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  1. Question 1

    6 Apr 2023

    97
    The work functions of Aluminium and Gold are 4.1eV4.1eV and 5.1eV5.1eV respectively. The ratio of the slope of the stopping potential versus frequency plot for Gold to that of Aluminium is

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  2. Question 2

    30 Jan 2024

    93
    For the photoelectric effect, the maximum kinetic energy ( EkE_{k} ) of the photoelectrons is plotted against the frequency (v) of the incident photons as shown in figure. The slope of the graph gives

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  3. Question 3

    24 Jan 2025

    87
    In photoelectric effect, the stopping potential (Vo)\left( V_{o} \right) v/sv/s frequency ( v ) curve is plotted. ( h is the Planck's constant and ϕ0\phi_{0} is work function of metal) (A) V0v/svV_{0}v/sv is linear (B) The slope of V0v/svV_{0}v/sv curve =ϕ0 h=\frac{\phi_{0}}{\text{ }h} (C) h constant is related to the slope of V0v/svV_{0}v/sv line (D) The value of electric charge of electron is not required to determine h using the V0v/svV_{0}v/sv curve. (E) The work function can be estimated without knowing the value of hh. Choose the correct answer from the options given below :

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