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The work function for the surface of alu...

The work function for the surface of aluminium is 4.2 eV. What will be the wavelenght of that incident light for which the stopping potential will be zero.
`(h=6.6xx10^(-34)J-se=1.6xx10^(-19)C)`

A

2496 Å

B

` 2946 xx 10 ^( -7) m`

C

2649 Å

D

3000 Å

Text Solution

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The correct Answer is:
D
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE-1 (OBJECTIVE QUESTIONS)
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  11. If the wavelength of incident light decrease from lamda 1 ...

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

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

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  14. When ultraviolet light of wavelength 100 nm is incident upon silver pl...

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  15. Slope of V(0) vs v curve is (where V(0)= Stopping potential, v=subject...

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  16. Figure represents the graph of photo current I versus applied ...

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  17. The graph between the energy of photoelectrons E and the wav...

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  18. In the diagram, graph are drawn between stopping potential ...

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  19. For a photoelectric cell, the graph shown the variation of c...

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