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The work function of lithium and copper ...

The work function of lithium and copper are 2.3 eV and 4.0 eV respectively. Which of these metals will be useful for the photo-electric cell working with visible light? Explain.

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Lithium, because its work function is less than the energy of the the vissible light photons.
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PRADEEP-DUAL NATURE OF RADIATION AND MATTER-Exercise
  1. The work function of lithium and copper are 2.3 eV and 4.0 eV respecti...

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  2. The photoelectric effect can be explained on the basis of

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  3. Which of the following has minimum stopping potential?

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  4. When radiation is incident on a photoelectron emitter, the potential i...

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  5. Two photons, each of energy 2.5 eV are simultaneously incident on the ...

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  6. The maximum velocity of an electron emitted by light of wavelength lam...

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  7. The photoelectric work function for a metal surface is 4.125 eV. The c...

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  8. The slope of frequency of incident light and stopping potential for a ...

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  9. Threshold wavelength for a metal having work function w(0) is lambda. ...

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  10. The work function for metals A , B and C are respectively 1.92 eV , 2....

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  11. The wavelength of the matter wave is independent of

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  12. If E(1), E(2), E(3), E(4) are the respective kinetic energies of elect...

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  13. What is de-Broglie wavelength assciated with electron moving under a ...

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  14. The minimum energy required by an electron to..........form the metal ...

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  15. The maximum kinetic energy of emitted photoelectrons depends on the......

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  16. The ratio of number of photoelectrons ejected to the number of the pho...

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  17. For given photosenstive material, the photoelectric current is...........

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  18. An increase in the frequency of the incident light.............the vel...

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  19. The minimum energy required to ejected an electron from the surface of...

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  20. In photoelectric effect the energy of the free electron does not depen...

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  21. Photon is not a..........but it is a.......... .

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