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An electromagnetic radiation of frequenc...

An electromagnetic radiation of frequency `3xx10^(15)` cycles per second falls on a photo electric surface whose work functions is 4.0eV. Find out the maximum velocity of the photo electrons emitted by the surface.

A

`13.4 xx 10^(-19) m// s `

B

`19.8 xx 10^(-19 ) m//s `

C

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

D

None

Text Solution

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The correct Answer is:
C
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE-1 (OBJECTIVE QUESTIONS)
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  2. Which metal will be suitable for a photo electric cell using light...

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  3. An electromagnetic radiation of frequency 3xx10^(15) cycles per second...

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  4. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

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  5. Two differenct photons of energies, 1 eV and 2.5 eV, fall on two ...

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  6. The KE of the photoelectrons is E when the incident wavelength is (lam...

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  7. The threshold wavelength of tungsten is 2300 Å. If ultra voile...

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  8. If the frequency of light in a photoelectric experiment is doubled the...

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  9. The stopping potential for photo electrons does not depend on

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  10. The work function for the surface of aluminium is 4.2 eV. What will be...

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  11. Light of wavelength 3320 Å incidents on metal surface (work fun...

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  12. Using light of wavelength 6000 Å stopping potential is obtained ...

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  13. When light source is placed at 1 m distant from photo electric...

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  14. In the given diagram if V represent the stopping potential and...

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  15. Photoelectric current as a function of voltage V for different ...

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  16. In the following figure the curves have been drawn between the...

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  17. When monochromatic light of wavelength lambda illuminates a metal surf...

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  18. If the wavelength of incident light decrease from lamda 1 ...

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  19. The retarding potential for having zero photo - electron current

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  20. In photoelectric effect work function of any metal is 2.5 eV. ...

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