Home
Class 12
PHYSICS
Five volt of stopping potential is neede...

Five volt of stopping potential is needed for the photoelectrons emitted out of a surface of work function 2.2 eV by the radiation of wavelength

A

`1719A`

B

`3444A`

C

`861A`

D

`3000A`

Text Solution

Verified by Experts

The correct Answer is:
A
`hv=5eV+2.2eV=7.2eV`
`7.2=(12375)/(lamda("in" A))`
or `lamda("in" A)=(12375)/(7.2)approx1719`
Promotional Banner

Topper's Solved these Questions

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Multiple Correct|10 Videos

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Linked Comprehension|44 Videos

  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS|Exercise Subjective|16 Videos

  • NUCLEI

    CENGAGE PHYSICS|Exercise QUESTION BANK|59 Videos

  • RAY OPTICS

    CENGAGE PHYSICS|Exercise DPP 1.6|12 Videos

Similar Questions

Explore conceptually related problems

The stopping potential for the photoelectrons emitted from a metal surface of work function 1.7 eV is 10.4 V. Find the wavelength of the radiaiton used. Also, identify the energy levels in hydrogen atom, which will emit this wavelength.

The stopping potential for the photo-electrons emitted from a metal surface of work-function 1.7 eV is 10.4 eV. Find the wavelength of the radiation used. Also identify the energy-levels in hydrogen atom which will emit this wavelength.

Calculate the value of retarding potential in volt needed to stop the photoelectron ejected from a metal surface of work function 1.29 eV with light frequency of 5.5 xx 10^(14) sec^(-1) (nearly)

The stopping potential for the photoelectrons emitted from a metal surface of work function 1.7 eV is 10.4 eV. Identify the energy levels corresponding to the transitions in hydrogen atom which will result in emission of wavelength equal to that of incident radiation for the above photoelectric effect.

Will photoelectrons be emitted from a copper surface, of work function 4.4 eV , when illuminated by a visible light?

The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface , having work function 5.01 eV , when ultraviolet light of 200 nm falls on it , must be

The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength 400 mm is 500 mV. When the incident wavelength is changed to a new value, the stopping potential is found to be 800 mV. New wavelength is about-

The stopping potential for photoelectrons ejected from a photosensitive material of work function 1.6 ev, when photons of energy 2.4 eV are incident on it, is

CENGAGE PHYSICS-PHOTOELECTRIC EFFECT-Single Correct
  1. If 5% of the energy supplied to a bulb is irradiated as visible light,...

    Text Solution

    |

  2. Which of the following graphs correctly represents the variation of pa...

    Text Solution

    |

  3. Five volt of stopping potential is needed for the photoelectrons emitt...

    Text Solution

    |

  4. The work function for tungsten and sodium are 4.5 eV and 2.3 eV respec...

    Text Solution

    |

  5. In a series of photoelectric emission experiments on a certain metal s...

    Text Solution

    |

  6. A point source causes photoelectric effect from a small metal plate. W...

    Text Solution

    |

  7. Let p and E denote the linear momentum and energy of a photon. If the ...

    Text Solution

    |

  8. Light from a hydrogen tube is incident on the cathode of a photoelectr...

    Text Solution

    |

  9. The photoelectric threshold for some material is 200 nm. The material ...

    Text Solution

    |

  10. The human eye can barely detect a yellow lings (lamda=6000A) that deli...

    Text Solution

    |

  11. X-rays are used to irradiate sodium and copper surfaces in two separat...

    Text Solution

    |

  12. An electron is accelerated through a potential difference of 200 volts...

    Text Solution

    |

  13. A photoelectric cell is connected to a source of variable potential di...

    Text Solution

    |

  14. Photoelectric work- function of a metal is 1 eV. Light of wavelength l...

    Text Solution

    |

  15. If a surface has a work function 4.0 eV, what is the maximum velocity ...

    Text Solution

    |

  16. An image of the sun is formed by a lens, of the focal length of 30 cm,...

    Text Solution

    |

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

    Text Solution

    |

  18. The work function of a metallic surface is 5.01 eV. The photoelectrons...

    Text Solution

    |

  19. An electron of mass me and a proton of mass mp are accelerated through...

    Text Solution

    |

  20. A material particle with a rest mass mo is moving with a velocity of l...

    Text Solution

    |