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The threshold wavelength for photoelectr...

The threshold wavelength for photoelectric emission from a
material is `5200 Å`. Photoelectrons will be emitted when this material is
illuminated with monochromatic radiation from a
(a) 50 W infrared lamp
(b) 1 W infrared lamp
(c ) 50 W ultraviolet lamp
(d) 1 W ultraviolet lamp
.

A

(i),(ii)

B

(ii),(iii)

C

(i),(iv)

D

(iii),(iv)

Text Solution

Verified by Experts

The correct Answer is:
D
Wavelength of ultravilote `lt 5000 Å`
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CP SINGH-PHOTOELECTRIC EFFECT-EXERCISES
  1. The cathode of a photoelectric cell is changed such that the work func...

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

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

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

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

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

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

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

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

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

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

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

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

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

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  15. The figure shows a plot of photo current versus anode potential for a ...

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  16. Which of the following is correct regarding de-Broglie wavelength?

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  17. de-Broglie wavelength associated with an electron accelerated through ...

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  18. An electron of mass me and a proton of mass mp are accelerated through...

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  19. A proton and an electron are accelerated by the same potential differe...

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  20. In which of the following cases the heavier of the two particles has a...

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