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Unit of Planck constant is :...

Unit of Planck constant is :

A

N m

B

eV

C

`J s^(-1)`

D

J s

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. Electron volt is a unit of

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  2. When a proton is accelerated with IV potential difference, then its ki...

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  3. Unit of Planck constant is :

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  4. Which one of the following statements about photon is incorrect?

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  5. A photon behaves as if it had a mass equal to

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

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  7. Photoelectrons are emitted,when

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

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

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

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

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  12. Einstein's photoelectric equation is expressed as

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

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

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

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

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

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

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

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

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