Home
Class 12
PHYSICS
The work function of a metal is 3.3 xx10...

The work function of a metal is `3.3 xx10^(-19)J`. The maximum wavelength of th e photons required to eject photoelectrons from the metal is (Take `h=6.6xx10^(-34)Js`)

A

4000 Å

B

6000 Å

C

8000 Å

D

200 Å

Text Solution

Verified by Experts

The correct Answer is:
B
`W_(0)=hv_(0)=(hc)/(lambda_(0))`
`:.lambda_(0)=(hc)/(W_(0))=(6.6xx10^(-34)xx3xx10^(8))/(3.3xx10^(-19))`
`=6xx10^(-7)m=6000 Å`
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 17|15 Videos

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 16|30 Videos

  • ELECTROSTATICS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|20 Videos

Similar Questions

Explore conceptually related problems

The work function of a metal is 3.45 eV. Calculate what should be the maximum wavelength of a photon that can eject photoelectrons from the metal ?

The minimum energy required for the emission of photoelectron from the surface of a metal is 4.95 xx10^(-19)J . Calculate the critical frequency of the photon required to eject the electron . h = 6.6 xx10^(-34) J sec

The work function of a metal is 2.5eV . The maximum kinetic energy of the photoelectrons emitted if a radiof wavelength 3000A^(0) falls on it is (h=6.63xx10^(-34)Js & c=3xx10^(8)m//s)

The threshold frequency of metals 4 x 10^(14) s^(-1) The minimum energy which photons must possess to produce photoelectric effect with the metal is (h=6.6 xx 10^(-34) Js)

A photon of energy 8 eV is incident on metal surface of threshold frequency 1.6 xx 10^(15) Hz , The maximum kinetic energy of the photoelectrons emitted ( in eV ) (Take h = 6 xx 10^(-34) Js ).

The work function of sodium metal is 4.41xx10^(-19)J . If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h=6.63xx10^(34)Js,c=3xx10^(8) m/s ______ xx10^(-21)

A photon of energy 8 eV is incident on a metal surface of threshold frequency 1.6 xx 10^(15) Hz , then the maximum kinetic energy of photoelectrons emitted is ( h = 6.6 xx 10^(-34) Js)

The work function of a photoelectric metal is 3.31 eV. If h=6.62xx10^(-34)Js , then its threshold frequency will be

The minimum energy required for the emission of photoelectron from the surface fo a metal is 4. 94 xx 10 ^(19) J . Calcualte the critical reequency and the corresponding wavelength of the critical frequency and the corresponding wavelngth of the photon requred to ejerct the electron. ( h = 6. 6 xx 10^(-234) J esc^(-1)) .

Find the photon energy for electromagnetic waves of wavelength 20m. Given h= 6.63xx10^(-34) "Js".

MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17
  1. The work function of a metal is 3.3 xx10^(-19)J. The maximum wavelengt...

    Text Solution

    |

  2. The energy of a photon of wavelength 4000 Å is (use h=6.66xx10^(-34...

    Text Solution

    |

  3. In a photoelectric experiment, the reciprocal of the slope of the st...

    Text Solution

    |

  4. The momentum of a photon of an electromagnetic radiation is 3.3xx10^(-...

    Text Solution

    |

  5. If the threshold frequency for photoemission on a metal corresponds t...

    Text Solution

    |

  6. Photons of energy 5.5 eV are incident on a metal surface. If the stopp...

    Text Solution

    |

  7. When light of energy 2.5 eV falls on a metal surface, the maximum K.E....

    Text Solution

    |

  8. The threshold energy of a surface is 2 eV. When irradiated with some r...

    Text Solution

    |

  9. Sodium and copper have work functions of 2.3 eV and 4.5 eV. The ratio ...

    Text Solution

    |

  10. The surface of a metal is illuminated with light of wavelength 400 nm....

    Text Solution

    |

  11. The current in a photocell can be just reduced to zero by a potential ...

    Text Solution

    |

  12. A lamp is placed at a distance of 8 cm from a photocell and the microa...

    Text Solution

    |

  13. The cathode of a photoelectric cell is changed such that the work func...

    Text Solution

    |

  14. The wavelength of the photons are 4500 Å and 6000 Å. The ratio of thei...

    Text Solution

    |

  15. An AIR station is broadcasting the waves of wavelength 300 metres. If ...

    Text Solution

    |

  16. For a photosensitive metal surface the graph of the stopping potential...

    Text Solution

    |