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Dual Nature of ...

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  • Question 1
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    A beam of light of wavelength λ and with illumination L falls on a clean surface of sodium. If N photoelectrons are emitted each with kinetic energy E, then

  • Question 2
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    The threshold frequency for certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 x 1014 Hz isincident on the metal, the cut-off voltage of the photoelectric current will be

  • Question 3
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    The photoelectric threshold wavelength of a certain metal is 3000 Å. If the radiation of 2000 Å is incident on the metal

  • Question 4
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    A photocell stops emission if it is maintained at 2V negative potential. The energy of most energetic photoelectron is

  • Question 5
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    The work functions for sodium and copper are 2 eV and 4 eV. Which of them is suitable for a photocell with 4000 Å light?

  • Question 6
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    For intensity I of a light of wavelength 5000 Åthe photoelectron saturation current is 0.40 µA and stopping potential is 1.36 V, the work function of metal is

  • Question 7
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    The work function of aluminum is 4.2 eV. If two photons, each of energy 3.5 eV strike an electron of aluminum, then emission of electrons will be

  • Question 8
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    In photoelectric effect if the intensity of light is doubled then maximum kinetic energy of photoelectrons will become

  • Question 9
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    In photoelectric effect, the electrons are ejected from metals if the incident light has certain minimum

  • Question 10
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    When photons of energy hv for on an aluminum plate (of work function = E0), photoelectrons of maximum kinetic energy K are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy ofthe ejected photoelectrons will be

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