Home
Class 12
PHYSICS
Ultraviolet radiaiton of 6.2 eV falls on...

Ultraviolet radiaiton of 6.2 eV falls on an aluminium surface(work function 4.2 eV).The kinetic energy (in joule of the fastenst electron emitted is approsimately

A

`3.2 xx 10^(-21)`

B

`3.2 xx 10^(-19)`

C

`4 xx 10^(-17)`

D

`3 xx 10^(-15)`.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • UNIT TEST -07

    MODERN PUBLICATION|Exercise EXERCISE|154 Videos

  • UNIT TEST -06

    MODERN PUBLICATION|Exercise EXERCISE|461 Videos

  • UNIT TEST-05

    MODERN PUBLICATION|Exercise EXERCISE|69 Videos

Similar Questions

Explore conceptually related problems

Light of wavelength 500 nm falls on a metal whose work function is 1.9 eV. find the kinetic energy of the photo electrons emitted.

Radiation corresponding to the transition n=4 to n=2 in hydrogen atoms falls on a certain metal (work function=2.5 eV). The maximum kinetic energy of the photo-electrons will be:

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV. Find the energy of the photons causing the photoelectric emission,

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV.find the quantum numbers of the two levels involved in the emission of these photons,

Light of wavelength 500 nm falls on a metal whose work function is 1.9 eV. find the energy of the Photon in eV

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV.find the recoil speed of the emitting atom assuming it to be at rest before the transmition.(Ionisation energy of hydrogen is 13.6 eV).

A radiation of 5000 overset @ A is incident on metal surface whose work- function is 1.2 eV. find out the value of stopping potential.

MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. A photo-sensitive material would emit elecrons.if excited by photons b...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  11. Electron volt is a unit of

    Text Solution

    |

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

    Text Solution

    |

  13. Unit of Planck constant is :

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  17. Photoelectrons are emitted,when

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |