Home
Class 11
PHYSICS
The work function of metal is 1 eV. Lig...

The work function of metal is `1 eV`. Light of wavelength `3000 Å` is incident on this metal surface . The velocity of emitted photo - electrons will be

A

`10m//s`

B

`1xx10^3m//s`

C

`1xx10^4m//s`

D

`1xx10^6 m//s`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Evaluation Test|19 Videos

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Critical thinking|22 Videos

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos

  • ELECTROSTATICS

    TARGET PUBLICATION|Exercise EXCERCISE|156 Videos

Similar Questions

Explore conceptually related problems

The work function of a metal is 2.5 eV. Light of wavelength 3600 Å is incident on this metal surface. The velocity of emitted photoelectrons will be

The work function for a metal whose threshold wavelength is 5000 Å is

The work function of a metal is 4.2 eV , its threshold wavelength will be

The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photoemission of electrons occurs. What is the maximum speed of the emmited photoelectrons ?

The work function of caesium metal is 2.14 eV. When light of frequency 6 xx 10^14 Hz is incident on the metal surface, photoemission of electrons occurs.What is the maximum kinetic energy of the emitted electrons ?

The work function for a metal surface is 2.2 eV. If light of wavelength 5000 overset (@)(A) isincident on the surface of the metal,find the threshold frequency and incident frequency.Will there be an emission of photoelectrons or not?

TARGET PUBLICATION-ELECTRONS AND PHOTONS-Competitive Thinking
  1. The momentum of a photon is 2 xx 10^(-16) gm - cm//sec. Its energy is

    Text Solution

    |

  2. If the energy of a photon corresponding to a wavelength of 6000 Å is ...

    Text Solution

    |

  3. If we express the energy of a photon in KeV and the wavelength in angs...

    Text Solution

    |

  4. A metal surface of work function 1.07 eV is irradiated with light of w...

    Text Solution

    |

  5. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

    Text Solution

    |

  6. Energy from the sun is recived on earth at the rate of 2 cal per cm^(2...

    Text Solution

    |

  7. when a monochromatic point source of light is at a distance 0.2 m from...

    Text Solution

    |

  8. When a metal surface is illuminated by light wavelengths 400 nm and 25...

    Text Solution

    |

  9. The velocity of the most energetic electrons emitted from a metallic s...

    Text Solution

    |

  10. A modern 200 W sodium street lamp emits yellow light of wavelength 0.6...

    Text Solution

    |

  11. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  12. The number of photons falling per second on a completely darkened plat...

    Text Solution

    |

  13. Photoelectric emission is observed from a metallic surface for frequen...

    Text Solution

    |

  14. A photoelectric surface is illuminated successively by monochromatic l...

    Text Solution

    |

  15. Two identical photo-cathodes receive light of frequencies f1 and f2. ...

    Text Solution

    |

  16. A metal surface is illuminated by light of two different wavelengths 2...

    Text Solution

    |

  17. A photon of energy E ejects a photoelectron from a metel surface whose...

    Text Solution

    |

  18. Light of wavelength lambda(A) and lambda(B) falls on two identical met...

    Text Solution

    |

  19. The energy of the electromagetic wave is of the order of 15 keV. To wh...

    Text Solution

    |

  20. The photoelectric work function of a surface is 2.2 eV. The maximum ki...

    Text Solution

    |