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The threshold frequency for a metallic s...

The threshold frequency for a metallic surface corresponds to an energy of 6.2eV and the stopping potential for a radiation incident on this surface is 5V. The incident radiation lies in

A

ultraviolet region

B

infrared region

C

visible region

D

X- ray region

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The correct Answer is:
A
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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-EXERCISE-I
  1. Photo cells are used in Light meters

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  2. The anode voltage of a photo cell is kept fixed. The wavelength lamda ...

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  3. The threshold frequency for a metallic surface corresponds to an energ...

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  4. The mass of electron varies with

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  5. The wavelengths of a photon, an electron and a uranium nucleus are sam...

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  6. The matter waves are

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  7. The wave nature of electron was verified by

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  8. If the value of Planck.s constant is more than its present value then ...

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  9. The ratio of wavelength of a photon and that of an electron of same en...

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  10. The De Broglie wavelength of a particle is equal to that of a photon, ...

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  11. If the KE of free electron doubles, its deBroglie wavelength changes b...

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  12. The Phenomena of photoelectric effect and Compton effect will conform

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  13. Statement (A): According to wave nature of light the radiant energy sp...

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  14. Select wrong statement of the following.

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  15. Davison and Germer.s and G.P. Thomson.s experiments gives

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  16. The photon of frequency v has a momentum associated with it. If C is t...

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  17. Moseley.s law for characteristic X-rays is sqrtv=a(Z-b). In this

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  18. The graph between frequency v of k. X-rays and the atomic number Z

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  19. Consider a photon of continuous X-ray and a photon of characteristic X...

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  20. When target potential in the X-ray tube is increased

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