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The potential difference that must be ap...

The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface , having work function `5.01 eV` , when ultraviolet light of `200 nm` falls on it , must be

A

` 1.2 ` V

B

`2.4 V `

C

`-1.2 V `

D

`-2.4 V `

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The correct Answer is:
C
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE - 3 SECTION -A (Previous Year Problems (NEET ))
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  2. A source S(1) is producing 10^(15) photons/s of wavelength 5000 Å Anot...

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

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

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

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

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

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  8. Light of two different frequencies whose photons have energies 1eV and...

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  9. In photoelectric emission process from a metal of work function 1.8 eV...

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  10. The threshold frequency for a photosensitive metal is 3.3 xx 10^(14) H...

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  11. An electron in the hydrogen atom jumps from excited state n to the gro...

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  12. Monochromatic radiation emitted when electron on hydrogen atom jumps f...

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  13. A modern 200 W sodium street lamp emits yellow light of wavelength 0.6...

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  14. A alpha -parhticle moves in a circular path of radius 0.83 cm in th...

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  15. An electrons of a stationary hydrogen aton passes form the fifth enegr...

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  16. Threshold frequency of a metal is 5xx10^(13)s^(-1) upon which 1xx10^(1...

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  17. The wavelength lambda(e ) of an electron and lambda(p) of a photon of...

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  18. For photoelectric emission from certain metal the cut - off frequency ...

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  19. When the energy of the incident radiation is increased by 20 % , kinet...

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  20. When a metallic surface is illuminated with radiation of wavelength la...

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