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Work function of metal in photoelectric ...

Work function of metal in photoelectric effect is 3.5 eV for -1.2 V potential photoelectric current become zero,Hence…….

A

energy of incident photon is 4.7 eV

B

energy of incident photon is 2.3 eV

C

when photon of high frequency are used then photoelectric current will be produced .

D

when energy of photon is 2.3 eV then photoelectric current is maximum

Text Solution

Verified by Experts

The correct Answer is:
A
Energy of incident photon,
`E_(K)=hf-phi`
`hf=phi-E_(K)`
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Knowledge Check

  • Work function of material is 4.0 eV. Maximum wavelength by which photoelectric emission can be obtained is ……….

    A
    540 nm
    B
    400 nm
    C
    310 nm
    D
    220 nm

  • Work function of photosensitive surface is 6.2 eV. If its stopping potential is 5V,then wavelength of incident radiation will be in……

    A
    ultraviolet
    B
    visible region
    C
    infrared region
    D
    X-rays region

  • Work function of metal is 1.6 eV for which maximum wavelength photoelectric emission can be obtained ? [h=6.6xx10^(-34)JS,c=3xx10^(8)m//s]eV=1.6xx10^(-19) J]

    A
    5800 Å
    B
    3867Å
    C
    29000Å
    D
    7734Å

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