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When ultraviolet rays are incident on a ...

When ultraviolet rays are incident on a metal plate,the photoelectric effect odes not occur.It occcurs by incidence of

A

radio waves

B

infra - red rays

C

visible ligth rays

D

X-rays.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. The minimum light intensity that can be perceived by the eye is about ...

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  2. Photoelectrons are emitted,when

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

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

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

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

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  7. Einstein's photoelectric equation is expressed as

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

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

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

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

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

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

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

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

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

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

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

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

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  20. An electron accelerated through a potential difference of V volt has a...

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