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The maximum kinetic energy of emitted ph...

The maximum kinetic energy of emitted photoelectrons depends on

A

potential

B

frequency

C

incident angle

D

pressure.

Text Solution

Verified by Experts

The correct Answer is:
B
Above the threshold frequency, the maximum kinetic energy of the emitted photoeletrons depends on the frequency of the incident light, but is independent of the intensit y of the incident light so long as the latter is not too high.
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For a metal the maximum wavelength required for photoelectron emission is 340 nm, find the work function. If the radiation of wavelength 250 nm falls on the surface of the given metal. Find the maximum kinetic energy of emitted photo electrons in eV. Given Planck's constant = 6.625 xx 10^(-34) Js , velocity of light in vacuum is 3 xx 10^(8)ms^(-1) .

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Knowledge Check

  • The kinetic energy of the photoelectrons depends upon:

    A
    intensity of radiation
    B
    frequency of radiation
    C
    the intensity and frequency of radiation
    D
    None of these

  • Light of wavelength 4700Å is incident on a metal plate whose work function is 2 eV. Then maximum kinetic energy of the emitted photoelectron would be

    A
    2.0 eV
    B
    1.1 eV
    C
    1.5 eV
    D
    0.5 eV

  • Statement I: Stopping potential depends upon the frequency of incident light but is independent of the intensity of the light. Statement II: The maximum kinetic energy of the photoelectrons is proportional to stopping potential.

    A
    A. Statement-I is false, statement-II is true.
    B
    Statement-I is true, statement-II is false.
    C
    Statement-I is true, statement-II is true. Statement-II is correct explanation of statement-I
    D
    Statement-I is true, statement-II is true and statement - II is not correct explanation of statement-I.

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    Two monochromatic radiations of frequencies v_(1) and v_(2) ( v_(1) gt v_(2) ) and having the same intensity are, in turn, incident on a photosensitive surface to cause photoelectric emission. Explain, giving reason, in which case (i) more number of electrons will be emitted and (ii) the maximum kinetic energy of the emitted photoelectrons will be more.

    The light photons of energy 1.5 eV and 2.5 eV are incident on a metallic surface of work function 0.5 eV, the ratio of the maximum kinetic energy of the photoelectrons is

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    The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon

    The K.E. of the photoelectrons depends upon

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