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A photosensitive metallic surface has wo...

A photosensitive metallic surface has work function , `h v_(0)`. If photons of energy ` 2hv_(0)` fall on this surface , the electrons come out with a maximum velocity of `4 xx 10^(6) m//s`. When the photon energy is increased to `5hv_(0)` ,then the maximum velocity of photoelectrons will be

A

` 2 xx 10 ^(7) ` m/s

B

` 2 xx 10^(6) ` m/s

C

` 8 xx 10^(5) ` m/s

D

` 8 xx 10^(6) ` m/s

Text Solution

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The correct Answer is:
D
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE - 3 SECTION -A (Previous Year Problems (NEET ))
  1. The work function for metals A , B and C are respectively 1.92 eV , 2....

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  2. A photosensitive metallic surface has work function , h v(0). If photo...

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  3. Momentum of a photon of wavelength lambda is

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  4. The momentum of moving particle is p . The wavelength lambda of the as...

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  5. A photo - cell employs photoelectric effect to convert

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  6. When photons of energy hv fall on an aluminium plate (of work function...

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  7. The momentum of a photon of energy 1 MeV "in" kg m//s will be

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  8. In photoelectric effect, the electrons are ejected from metals if the ...

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  9. A 5 W source emits monochromatic light of wavelength 5000 Å. When plac...

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  10. Monochromatic light of frequency 6.0 xx 10^(14) Hz is produced by a la...

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  11. The work function of a surface of a photosensitive material is 6.2 eV...

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  12. The number of photoelectrons emitted for light of a frequency v (highe...

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  13. Monochromatic light of wavelength 667 nm is produced by a helium neon ...

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  14. The figure shows a plot of photo current versus anode potential for a ...

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  15. A source S(1) is producing 10^(15) photons/s of wavelength 5000 Å Anot...

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  16. The potential difference that must be applied to stop the fastest phot...

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  17. The electron in the hydrogen atom jumps from excited state (n=3) to it...

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  18. Photoelectric emission occurs only when the incident light has more th...

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  19. The work functions for metals A, B and C are respectively 1.92 eV, 2....

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  20. Monochromatic light of wavelength 667 nm is produced by a helium neon ...

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