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Photoelectrons are being obtained by irr...

Photoelectrons are being obtained by irradiating zinc by a radiation of `3,100 overset @A`. In order to increase the kinetic energy of ejected photoelectrons,

A

the intensity of radiation should be increased

B

the wavelength of radiation should be increased

C

the wavelength of radiation should be decreasec

D

both wavelength and intensity of radiation should be increased

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. The threshold wavelength for photoelectric effect for a material is 52...

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  2. A photo-sensitive material would emit elecrons.if excited by photons b...

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  3. Photoelectrons are being obtained by irradiating zinc by a radiation o...

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  4. Ultraviolet radiaiton of 6.2 eV falls on an aluminium surface(work fun...

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  5. When a monochromatic point source of light is at a distance of 0.2 m f...

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

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

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

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

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

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

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  12. Electron volt is a unit of

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

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  14. Unit of Planck constant is :

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

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

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

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  18. Photoelectrons are emitted,when

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

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

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