Home
Class 12
PHYSICS
A photosensitive metallic surface has wo...

A photosensitive metallic surface has work function , `h v_(0)`. If photons of energy ` 2hv_(0)` fall on this surface , the electrons come out with a maximum velocity of `4 xx 10^(6) m//s`. When the photon energy is increased to `5hv_(0)` ,then the maximum velocity of photoelectrons will be

A

`2 xx 10^(6) m//s`

B

`2 xx 10^(7)m//s`

C

`8 xx 10^(5) m//s`

D

`8 xx 10^(6) m//s`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise PHYSICS|38 Videos
  • ELECTROSTATICS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise Electrostatics|76 Videos
NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-ELECTRONS AND PHOTONS-All Questions
  1. In a discharge tube ionization of enclosed gas is produced due to coll...

    Text Solution

    |

  2. A photocell employs photoelectric effect to convert

    Text Solution

    |

  3. A photosensitive metallic surface has work function , h v(0). If photo...

    Text Solution

    |

  4. The work function for metals A , B and C are respectively 1.92 eV , 2....

    Text Solution

    |

  5. According to Einstein's photoelectric equation , the graph between the...

    Text Solution

    |

  6. A photoelectric cell is illuminated by a point source of light 1 m awa...

    Text Solution

    |

  7. Which of the following is not the property of a cathode rays

    Text Solution

    |

  8. If particles are moving with same velocity , then maximum de - Broglie...

    Text Solution

    |

  9. A caesium photocell , with a steady potential difference of 60 V acros...

    Text Solution

    |

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

    Text Solution

    |

  11. As the intensity of incident light increases

    Text Solution

    |

  12. The photoelectric work function for a metal surface is 4.125 eV. The c...

    Text Solution

    |

  13. In a photoemissive cell, with exciting wavelength lambda, the faster e...

    Text Solution

    |

  14. Light of wavelength 5000 Å falls on a sensitive plate with photoelectr...

    Text Solution

    |

  15. The 21 cm radio wave emitted by hydrogen in interstellar space is due ...

    Text Solution

    |

  16. An electron of mass m and charge e is accelerated from rest through a ...

    Text Solution

    |

  17. The wavelength associated with an electron accelerated through a poten...

    Text Solution

    |

  18. Kinetic energy of an electron accelerated in a potential difference of...

    Text Solution

    |

  19. Gases begin to conduct electricity at low pressure because

    Text Solution

    |

  20. In photoelectric effect the work function of a metal is 3.5 eV. The em...

    Text Solution

    |