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If the distance of 100 W lamp is increas...

If the distance of 100 W lamp is increased from a photo cell,the saturation curent I in the photocell varies with distnace d as

A

`1 prop d^2`

B

`1 prop d`

C

`1 prop 1 //d`

D

`1 prop 1 // d^2`.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. Photoelectrons are emitted,when

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

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

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

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

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  6. Einstein's photoelectric equation is expressed as

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. An electron is accelerated through a potential difference of 150 V. Th...

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