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The work function of a substance is 4eV....

The work function of a substance is 4eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately

A

310 nm

B

400 nm

C

540 nm

D

220 nm

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-PRACTICE EXERCISEX
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  3. The work function of a substance is 4eV. The longest wavelength of lig...

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  4. The photo electric work function of a metal is 1 eV. Light of wave len...

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  5. When a mono chromatic point source of light is at a distance of 0.2m f...

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  6. The work function of a substance is 12.4 eV. The longest wavelength of...

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  7. A surface irradiated with light of wave length 480 nm gives out electr...

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  8. The photoelectric threshold wavelength for a certain metal is 4000A^(@...

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  9. What P.D. must be applied to stop the fastest photo electron emitted b...

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  10. The threshold frequency for photo electric effect for a metal surface ...

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  11. The work functions of metals A and B are in the ratio 1 : 2. If light ...

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  12. When a metal surface is illuminated by a light of wavelength 400nm and...

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  13. V(1) and V(2) are the stopping potentials for the incident radiations ...

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  14. A monochromatic light source is placed at a distance d from a metal su...

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  15. If the work function of a certain metal is 3.2xx10^(-19)J and is it il...

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  16. Work function of a metal is 3.0 eV. It is illuminated by a light of wa...

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  17. A metal sheet of silver is exposed to ultraviolet radiation of wavelen...

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  18. The threshold wavelength for emission of photoelectrons from a metal s...

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  19. What will be the minimum frequency of light source to get photocurrent...

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  20. A stationary shell of mass M explodes in to two parts and their masses...

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