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A phot of energy h upsilon is absorbed b...

A phot of energy `h upsilon` is absorbed by a free electron of a metal having work function `phi lt h upsilon`

A

The electron is sure to come out

B

The electron is sure to come out with a K.E. `=h upsilon - phi`

C

Either the electron does not come out or it comes out with a K.E. `=h upsilon - phi`

D

It may come out with K.E. `lt(h upsilon - phi)`

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The correct Answer is:
D
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CP SINGH-PHOTOELECTRIC EFFECT-EXERCISES
  1. The photocurrent in an experiment on photoelectric effect increases if

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  2. A point source of light is used in a photoelectric effect. If the sour...

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  3. A phot of energy h upsilon is absorbed by a free electron of a metal h...

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  4. Photoelectric effect supports quantum nature of light because (a) th...

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

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  6. Two identical metal plates show photoelectric effect by a light of wav...

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  7. The cathode of a photoelectric cell is changed such that the work func...

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  8. The frequency and intensity of a light source are both doubled. Consid...

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  9. The threshold wavelength for photoelectric emission from a material ...

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  10. A photoelectric cell is illuminated by a point source of light 1 m awa...

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  11. If the distance of 100 Watt lamp is increased from a photocell, the sa...

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  12. A point source causes photoelectric effect from a small metal plate. W...

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  13. When a monochromatic point source of light is at a distance of 0.2 m...

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  14. The collector plate in an experiment on photoelectric effect is kept v...

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  15. The electric field associated with a light wave is given by E= E0 sin...

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  16. A beam of light of wavelength lambda is incident on a metal having wor...

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  17. A photon of energy E ejects a photoelectron from a metel surface whose...

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  18. A monochromatic light of wavelength lambda is incident on an isolated ...

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  19. Photoelectric effect experiments are performed using three different m...

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  20. The graph between 1//lambda and stopping potential (V) of three metals...

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