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Energy of photon incident on a metal pla...

Energy of photon incident on a metal plate is twice its work function. How many times should be the wavelength of incident light so that the kinetic energy of the fastest electron will be doubled?

A

`(3)/(2)` times

B

`(2)/(3)` times

C

`(1)/(2)` times

D

2 times

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The correct Answer is:
B
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CHHAYA PUBLICATION-QUANTUM THEORY-Exercise (Multiple Choice Questions)
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  2. For two monochromatic radiations incident on the same metal surface, t...

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  3. Energy of photon incident on a metal plate is twice its work function....

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  4. Work function of zinc is twice that of sodium. If the photoelectric th...

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  5. Threshold wavelength of a metal for electron emission is 5200Å. Which ...

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  7. In case of photoelectric effect, the incident photon

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  8. Which of the following quantities has the same dimension as that of Pl...

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  9. In case of photoelectric effect, the graph of kinetic energy of photoe...

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  10. A body absorbs 5 xx 10^(29) photons of frequency 10^(20) Hz. Which of ...

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  11. The momentum of a photon (frequency = f, rest mass = 0) is

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  12. A monochromatic radiation of wavelength lamda and intensity I is incid...

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

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  14. The anode voltage of a photocell is kept fixed. The wavelength lamda o...

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  15. A body of mass 60g is moving with a velocity of 10 m.s^(-1). The de Br...

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  16. If the de Broglie wavelength of a gas molecule at 0^(@)C be lamda, wha...

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  17. Two moving electrons have a ratio of 1 : 2 between their respective ki...

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  18. An electron is accelerated by a photential difference V and as a resul...

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  19. The wavelength associated with an electron of mass m having kinetic en...

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  20. The wavelength of a light is 0.01 Å. If h be the Planck's constant, th...

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