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Draw a graph showing the variation of stopping potential with frequency of the incident on a metal plate. How can the value of Planck's constant be determined from this graph?

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To solve the problem of drawing a graph showing the variation of stopping potential (V₀) with the frequency (ν) of incident radiation on a metal plate, and determining the value of Planck's constant (h) from this graph, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Photoelectric Effect**: The photoelectric effect describes how electrons are emitted from a metal surface when it is exposed to light of sufficient frequency. The energy of the incident photons must be greater than the work function (φ₀) of the metal for electrons to be emitted. 2. **Use Einstein's Photoelectric Equation**: ...
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Knowledge Check

  • In a photocell circuit the stopping potential, V_0 , is a measure of the maximum kinetic energy of the photoelectrons. The following graph shows experimentally measured values of stopping potential versus frequency v of incident light. The values of Planks constant and the work function as determined from the graph are (taking the magnitude of electronic charge to be e= 1.6 xx 10^(-19)C )

    A
    `6.4 xx 10^(-34) Js, 2.0 eV`
    B
    `6.0 xx 10^(-34) Js , 2.0 eV`
    C
    `6.4 xx 10^(-34) Js , 3.2 eV`
    D
    `6.0 xx 10^(-34) Js , 3.2 eV`

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