Home
Class 11
PHYSICS
When light of 2.5 eV falls on a metal su...

When light of 2.5 eV falls on a metal surface, maximum kinetic energy of electron is T. If incident radiation of 4 eV falls on same metal surface, maximum kinetic energy of electrons is doubled. The work function of metal is

A

1 eV

B

4 eV

C

1 .5 eV

D

0 .5 eV

Text Solution

Verified by Experts

The correct Answer is:
A
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

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|16 Videos

Similar Questions

Explore conceptually related problems

When light falls on a metal surface , the maximum kinetic energy of the emitted photo - electrons depends upon

When light of energy 2.5 eV falls on a metal surface, the maximum K.E. of the emitted electrons is T. If the radiation of energy 4eV is made incident on the same metal surface, the K.E. of the electrons is doubled. What is the work function of the metal ?

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

If ultraviolet radiation of 6.2 eV falls of an aluminium surface , then kinetic energy of the fastest emitted electrons is (work function = 4.2 e V)

A light of wavelength 600 nm is incident on a metal surface. When light of wavelength 400 nm is incident, the maximum kinetic energy of the emitted photoelectrons is doubled. The work function of the metals is

When an electro-magnetic radiation is incident on the surface of metal, maximum kinetic energy of photoelectron depends on-

If light of wavelength lambda_(1) is allowed to fall on a metal , then kinetic energy of photoelectrons emitted is E_(1) . If wavelength of light changes to lambda_(2) then kinetic energy of electrons changes to E_(2) . Then work function of the metal is

A photon of energy 2.5 eV and wavelenght lambda falls on a metal surface and the ejected electron have velocity 'v' . If the lambda of the incident light is decreased by 20% the maximum velocity of the emitted electrons is doubled. The work function of the metal is

Maximum kinetic energy of photoelectrons emitted from a metal surface, when light of wavelength lambda is incident on it, is 1 eV. When a light of wavelength lambda/3 is incident on the surfaces, maximum kinetic energy becomes 4 times. The work function of the metal is

When a radiation of energy 5eV falls on a surface,the emitted photoelectrons have a maximum kinetic energy of 3eV .The stopping potential is

TARGET PUBLICATION-ELECTRONS AND PHOTONS-Competitive Thinking
  1. If 5% of the energy supplied to a bulb is irradiated as visible light,...

    Text Solution

    |

  2. Monochromatic radiation emitted when electron on hydrogen atom jumps f...

    Text Solution

    |

  3. When light of 2.5 eV falls on a metal surface, maximum kinetic energy ...

    Text Solution

    |

  4. On a photosensitive material, when frequency of incident radiation ...

    Text Solution

    |

  5. Photons with energy 5 eV are incident on a cathode C in a photoelectri...

    Text Solution

    |

  6. When photons of energy hv fall on an aluminium plate (of work function...

    Text Solution

    |

  7. Assuming photoemission to take place , the factor by which the maximum...

    Text Solution

    |

  8. For photoelectric emission from certain metal the cut - off frequency ...

    Text Solution

    |

  9. Radiation of wavelength lambda in indent on a photocell . The fastest ...

    Text Solution

    |

  10. The photoelectric threshold wavelength of silver is 3250 xx 10^(-10) m...

    Text Solution

    |

  11. When light of frequency v1 incident on a metal with work function W0 (...

    Text Solution

    |

  12. When light falls on a metal surface , the maximum kinetic energy of th...

    Text Solution

    |

  13. The velocity of photon is proportional to (where v is frequency)

    Text Solution

    |

  14. Which of the following statements is not correct?

    Text Solution

    |

  15. If E and P are the energy and the momentum of a photon respectively,th...

    Text Solution

    |

  16. is the wavelength of photon of energy 35 ke V.

    Text Solution

    |

  17. The maximum wavelength of radiation that can produce photoelectric eff...

    Text Solution

    |

  18. The momentum of a photon is 3.3xx10^(-29)kg-m/s. Its frequency will b...

    Text Solution

    |

  19. A photon of wavelength 4400 Å is passing through vaccum. The effective...

    Text Solution

    |

  20. The momentum of a photon is 2 xx 10^(-16) gm - cm//sec. Its energy is

    Text Solution

    |