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The graph between 1 //lambda and stoppin...

The graph between `1 //lambda` and stopping potential (V) of three metals having work function`omega_1,omega_2` and `omega_3` in an experiment of photoelectric effect is plotted as shown in the figure.Which of the following statements is / are correct?
.

A

ratio of work functions is`omega_1:omega_2:omega_3=1:2:4`

B

Ratio of work functions is `omega_1:omega_2:omega_3 = 4:2:1`

C

tan `theta` is directly proportional to `h c //e`,where h i sPlanck's constant and c is the speed of light

D

The violet colour light can eject photoelectrons from metals 2 and 3.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. When a monochromatic point source of light is at a distance of 0.2 m f...

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  2. The figrue shows the variation of photocurrent with anode potential fo...

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  3. The graph between 1 //lambda and stopping potential (V) of three metal...

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  4. The energy of a photon is equal to the kinetic energy of a proton.The...

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  5. A particle of mass M at rest decays into two particles of masses m1 an...

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  6. A beam of electrons is used in an Young's double slit experiment.The s...

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  7. Electrons with de-Broglie waveelngth lambda fall on the target in an X...

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  8. Electron volt is a unit of

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

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  10. Unit of Planck constant is :

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

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

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

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  14. Photoelectrons are emitted,when

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

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

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

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

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  19. Einstein's photoelectric equation is expressed as

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

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