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The threshold frequency for a metallic s...

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

A

Ultraviolet region

B

Infrared region

C

Visible region

D

X-ray region

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AAKASH INSTITUTE ENGLISH-DUAL NATURE OF RADIATION AND MATTER -ASSIGNMENT SECTION A. Objective (Only one answer)
  1. In an experiment on photoelectric effect the frequency f of the incide...

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  2. If the work function of a metal is 'phi' and the frequency of the inci...

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  3. The threshold frequency for a metallic surface correponds to an energy...

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  4. Two identical photocathodes receive light of frequencies v(1) and v(2)...

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  5. Specific heat of water is 4.2 J//g.^(@)C. If light of frequency 3 xx 1...

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  6. A red bulb and violet bulb of equal power emits n(R ) and n(v) number ...

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  7. For a certain metal, incident frequency v is five times of threshold f...

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  8. Ultraviolet light of wavelength 66.26 nm and intensity 2 W//m^(2) fall...

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  9. Two sources A and B have same power . The wavelength of radiation of A...

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  10. The work function of a certain metal is 2.3 eV. If light of wave numbe...

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  11. When the electromagnetic radiations of frequencies 4 xx 10^(15) Hz and...

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  12. If the velocity of an electron is doubled, its de-Broglie frequency wi...

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  13. The duration of a laser pulse is 10^(-8) s. The uncertainly in its ene...

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  14. A proton and an alpha-particle are accelerated through the same potent...

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  15. How many photons are emitted by a laser source of 5 xx 10^(-3) W ope...

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  16. The number of photons emitted by a 60 W bulb per second, if 10% of the...

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  17. The momentum of a photon having energy equal to the rest energy of an ...

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  18. A perfectly reflecting solid hemisphere of radius R is placed in the p...

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  19. Find the ratio of de Broglie wavelength of molecules of hydrogen and h...

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  20. A particle which has zero rest mass and non - zero energy and momentum...

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