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Dual Nature of Radiation and Matter Test - 87

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Dual Nature of Radiation and Matter Test - 87
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  • Question 1
    4 / -1
    The magnitude of saturation photoelectric current depends upon
  • Question 2
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    The number of photons of wavelength 540 nm emitted per second by an electric bulb of power 100 W is (taking h =6 ×10–34 J-s)
    Solution

  • Question 3
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    A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 1/2 m away, the number of electrons emitted by photo cathode would
    Solution

  • Question 4
    4 / -1
    Two identical metal plates show photoelectric effect by a light of wavelength λA falling on plate A and λB on plate B (λA =2λB). The maximum kinetic energy is
    Solution

  • Question 5
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    The threshold wavelength for photoelectric effect of a metal is 6500 Å. The work function of the metal is approximately
    Solution

  • Question 6
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    When ultraviolet rays are incident on metal plate, then photoelectric effect does not occur. It occurs by the incidence of
    Solution

  • Question 7
    4 / -1
    A photosensitive metallic surface has work function hv0. If photons of energy 2hv0 fall on this surface the electrons come out with a maximum velocity of4 × 106 m/s. When the photon energy is increases to5hv0 then maximum velocity of photo electron will be
    Solution

  • Question 8
    4 / -1
    Which of the following shows particle nature of light?
  • Question 9
    4 / -1
    Light of wavelength 1824 Å, incident on the surface of a metal, produces photo-electrons with maximum energy 5.3 eV. When light of wavelength 1216 Å is used, the maximum energy of photoelectrons is 8.7 eV. The work function of the metal surface is
    Solution

  • Question 10
    4 / -1
    If the energy of a photon corresponding to a wavelength of 6000 Å is 3.32 × 10–19 J, the photon energy for a wavelength of 4000 Å will be
    Solution

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