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Photoelectrons are emitted,when...

Photoelectrons are emitted,when

A

a zinc plate is heated

B

a zinc plate is hammered

C

a zinc plate is irradiated with ultraviolet light

D

a zinc plate is subjected to very high pressure.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. A photon behaves as if it had a mass equal to

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  2. The minimum light intensity that can be perceived by the eye is about ...

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  3. Photoelectrons are emitted,when

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  4. When ultraviolet rays are incident on a metal plate,the photoelectric ...

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  5. If the distance of 100 W lamp is increased from a photo cell,the satur...

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  6. A photocell is illuminated by a small bright source placed 1 m away .w...

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  7. Consider light of given intensity and frequency falling on a substance...

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  8. Einstein's photoelectric equation is expressed as

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  9. Light of two difference efrequencyies,whose phtothns have energies 1 e...

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  10. The maximum velocity of an elecron ejected from a photoelectric emitte...

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  11. When radiation is incident on a photoelectron emitteer,the stopping po...

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  12. An image of the sun is formed by a lens of focla length 50 cm on a pho...

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  13. If c is velocity of light ,then momentum of a photon of frequency is

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  14. The energy of a photon is 3 xx 10^(-19) J.Its momentum is

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  15. The energy E and momentum p of a photon is given by E=h v and p= h//la...

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  16. The de-Broglie wavelength of an elecrtron mov ing with a speed of 6.6 ...

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  17. The wavelength of an electron moving with a velocity of 500 km s^(-1) ...

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  18. The de-Broglie wavelength lambda of a particle is related to ites kine...

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  19. Neglecting variation of mass with energy, the wavelength associated wi...

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  20. Consider a proton moving with kinetic energy E. Its de-Broglie wavelen...

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