Awesome Quiz On Photoelectric Effect

8 Questions | Total Attempts: 1521

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Awesome Quiz On Photoelectric Effect

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Questions and Answers
  • 1. 
    What is the term used to refer to the minimum energy required for a photoelectron to escape from a metal plate in a photocell?
    • A. 

      Stopping voltage

    • B. 

      Planck’s constant

    • C. 

      Threshold wavelength

    • D. 

      Work function

  • 2. 
    Threshold frequency is to work function as hertz is to which one of the following?
    • A. 

      Coulomb

    • B. 

      Joule

    • C. 

      Newton

    • D. 

      Watt

  • 3. 
    The variable that varies directly with the amount of current produced by photoelectrons
    • A. 

      The intensity of the incident light

    • B. 

      The frequency of the incident light

    • C. 

      The wavelength of the incident light

    • D. 

      The work function of the metal surface

  • 4. 
    The threshold frequency has a value of X.  If the frequency of the incident light increases from 2X to 4X, then the resulting current of photoelectrons
    • A. 

      Is doubled

    • B. 

      Is increased by a factor or 3

    • C. 

      Reduced by half

    • D. 

      Remains the same

  • 5. 
     When electromagnetic radiation with a wavelength of 350 nm falls on a metal, the maximum kinetic energy of the ejected electrons is 1.20 eV.  What is the work function of the metal?
    • A. 

      1.3 eV

    • B. 

      2.4 eV

    • C. 

      5.4 eV

    • D. 

      5.7 eV

  • 6. 
    Calculate the wavelength of a photon with 3.2 × 10–19 J of energy.
    • A. 

      210 nm

    • B. 

      420 nm

    • C. 

      530 nm

    • D. 

      620 nm

  • 7. 
    The graph below shows the relationship between the frequency of radiation incident on a photosensitive surface and the maximum kinetic energy of the emitted photoelectrons What does point P represent?
    • A. 

      Fundamental frequency

    • B. 

      Photoelectron frequency

    • C. 

      Photon escape frequency

    • D. 

      Threshold frequency

  • 8. 
    The work function of a particular photo-emissive material is 4.0 eV.  If photons with 16 eV of energy are incident on the material, what would be the maximum kinetic energy of the ejected photoelectrons?
    • A. 

      0.25 eV

    • B. 

      4.0 eV

    • C. 

      12 eV

    • D. 

      20. eV