Home
Class 12
PHYSICS
A silver balll is suspended by a string ...

A silver balll is suspended by a string in a vacuum chamber and ultraviolet light of wavelength `2000 Å` is directed at it. What electrical potential will the ball acquire as a result? Work function of silver is 4.3 eV.

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(max) (in eV) = E -W`
`= (12375)/(2000) - 4.3`
=1.9 eV
Therefore, stopping potentia is 1.9 V.
Promotional Banner

Topper's Solved these Questions

  • MODERN PHYSICS - 1

    DC PANDEY ENGLISH|Exercise Level 2 Single Correct|22 Videos

  • MODERN PHYSICS - 1

    DC PANDEY ENGLISH|Exercise Level 2 More Than One Correct|6 Videos

  • MODERN PHYSICS - 1

    DC PANDEY ENGLISH|Exercise Level 1 Objective|37 Videos

  • MODERN PHYSICS

    DC PANDEY ENGLISH|Exercise Integer Type Questions|17 Videos

  • MODERN PHYSICS - 2

    DC PANDEY ENGLISH|Exercise Level 2 Subjective|10 Videos

Similar Questions

Explore conceptually related problems

A silver ball of radius 4.8 cm is suspended by a thread in a vacuum chamber, Ultraviolet light of wavelength 200nm is incident on the ball for some time during which a total light energy of 1.0 xx 10^-7 J falls on the surface. Assuming that on the average one photon out of every ten thousand is able to eject a photoelectron, find the electric potential at the surface of the ball assuming zero potential at infinity. What is the potential at the centre of the ball?

A silver of radius 4.8 cm is suspended by a thread in the vacuum chamber . UV light of wavelength 200 nm is incident on the ball for some times during which a total energy of 1 xx 10^(-7) J falls on the surface . Assuming on an average one out of 1000 photons incident is able to eject electron. The potential on sphere will be

Find the threshold wavelength of light that would produce photoelectrons for a silver surface . The work function for silver is 4.8 eV

The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :

Silver has a work function of 4.7 eV. When ultraviolet light of wavelength 100 mm is incident upon it, a potential of 7.7 V is required to stop the photoelectrons from reaching the collector plate. How much potential will be required to stop the photoelectrons when light of wavelength 200mm is incident upon silver?

A sphere of work function phi=4.6 eV is suspended in a vacuum number by an insulating thread. Radiation of wavelength lambda =0.2 mum stricke on the sphere. The maximum electric pontential of the sphere will be

What is the strength of transverse magnetic field required to bend all the photoelectrons within a circle of a radius 50 cm when light of wavelength 3800 Å is incident on a barium emitter ? (Given that work function of barium is 2.5 eV, h=6.63xx10^(-34)js, e=1.6xx10^(19)C,m=9.1xx10^(-31)kg

Light of wavelength 2000 Å falls on a metallic surface whose work function is 4.21 eV. Calculate the stopping potential

All electrons ejected from a surface by incident light of wavelength 200nm can be stopped before traveling 1m in the direction of a uniform electric field of 4 NC^(-1) . The work function of the surface is

Light of wavelength 2000Å is incident on a metal surface of work function 3.0 eV. Find the minimum and maximum kinetic energy of the photoelectrons.

DC PANDEY ENGLISH-MODERN PHYSICS - 1-Level 1 Subjective
  1. A hydrogen like atom (described by the Bohr model) is observed ot emit...

    Text Solution

    |

  2. The energy levels of a hypothetical one electron atom are shown in t...

    Text Solution

    |

  3. (a) An atom initally in an energy level with E = - 6.52 eV absorbs a ...

    Text Solution

    |

  4. A silver balll is suspended by a string in a vacuum chamber and ultrav...

    Text Solution

    |

  5. A small particle of mass m move in such a way the potential energy (U ...

    Text Solution

    |

  6. Wavelength of Kalpha line of an element is lambda0. Find wavelength o...

    Text Solution

    |

  7. x-rays are produced in an X-ray tube by electrons accelerated through ...

    Text Solution

    |

  8. From what meterial is the anod of an X-ray tube made if the Kalpha li...

    Text Solution

    |

  9. The short-wavelength limit shifts by 26 pm when the operating voltage ...

    Text Solution

    |

  10. The kalpha X-rays of aluminium (Z = 13 ) and zinc ( Z = 30) have wavel...

    Text Solution

    |

  11. Characteristic X-rays of frequency 4.2xx10^18 Hz are produced when tr...

    Text Solution

    |

  12. The electric current in an X-ray tube (from the target to the filament...

    Text Solution

    |

  13. The stopping potential for the photoelectrons emitted from a metal sur...

    Text Solution

    |

  14. What will be the maximum kinetic energy of the photoelectrons ejected ...

    Text Solution

    |

  15. A metallic surface is irradiated with monochromatic light of variable ...

    Text Solution

    |

  16. A graph regarding photoelectric effect is shown between the maximum k...

    Text Solution

    |

  17. A metallic surface is illuminated alternatively with light of waveleng...

    Text Solution

    |

  18. Light of wavelength 180 nm ejects photoelectrons from a plate of met...

    Text Solution

    |

  19. Light described at a palce by te equation E=(100 V/m) [sinxx10^15 s...

    Text Solution

    |

  20. The electric field associated with a light wave is given by E= E0 sin...

    Text Solution

    |