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What is stopping potential?...

What is stopping potential?

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Stopping Potential is the opposing potential needed to stop the moving photo-electron. This potential is independent of the intensity of the radiation but dependent on the frequency of radiation. Higher the energy of radiation greater is the value of stopping potential.
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Knowledge Check

  • A photon of energy 7 eV is incident on a metal surface having the work function of 3.75 eV. What is the stopping potential ?

    A
    2 V
    B
    3 V
    C
    3.25 V
    D
    4.5 V

  • What is the stopping potential, when a metal surface with work function 1.2 eV is illuminated with light of energy 3 eV ?

    A
    1.8 V
    B
    4.2 V
    C
    2.1 V
    D
    0.8 V

  • What is the stopping potential when the metal with work function 0.6 eV is illuminated with the light of 2 eV ?

    A
    `2.6 V`
    B
    `3.6 V`
    C
    `0.8 V`
    D
    `1.4 V`

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    What is the stopping potential when a metal, of photoelectric work function 4.13 eV , is irradiated with UV photons of energy 6.2 eV?

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