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Dual Nature of ...

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  • Question 1
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    Let nr and nb be respectively the number of photons emitted by a red bulb and a blue bulb of equal power in a given time.

  • Question 2
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    10-3 W of 5000 Ålight is directed on a photoelectric cell. If the current in the cell is 0.16 mA, the percentage of incident photons which produce photoelectrons, is

  • Question 3
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    If the frequency of light in a photoelectric experiment is doubled, the stopping potential will

  • Question 4
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    The stopping potential for the photo electrons emitted from a metal surface of work function 1.7eV is 10.4 V. Identify the energy levels corresponding to the transitions in hydrogen atom which will result in emission of wavelength equal to that of incident radiation for the above photoelectric effect

  • Question 5
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    When a photon of light collides with a metal surface, number of electrons, (if any) coming out is

  • Question 6
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    A point source of light is used in photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential

  • Question 7
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    A point source causes photoelectric effect from a small metal plate. Which of the following curves may represent the saturation photocurrent as a function of the distance between the source and the metal?

  • Question 8
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    The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4eV. The stopping potential is Volts is

  • Question 9
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    Radiation of two photon energies twice and five times the work function of metal are incident sucessively on the metal surface. The ratio of the maximum velocity of photoelectrons emitted is the two cases will be

  • Question 10
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    Cut off potentials for a metal in photoelectric effect for light of wavelength l1 , l2 and l3 is found to be V1 , V2 and V3 volts if V1 , V2 and V3 are in Arithmetic Progression and l1 , l2 and l3 will be

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