Home
Class 12
PHYSICS
The KE of the photoelectrons is E when t...

The KE of the photoelectrons is E when the incident wavelength is `(lamda)/(2)`. The KE becomes 2E when the incident wavelength is `(lamda)/(3)`. The work function of the metal is

A

` (hc) /(lamda)`

B

` (2hc)/(lamda)`

C

`(3hc)/(lamda)`

D

`(hc)/(3 lamda)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • PHOTOELECTRIC EFFECT

    MOTION|Exercise EXERCISE-2 (OBJECTIVE QUESTIONS (NEET))|17 Videos

  • PHOTOELECTRIC EFFECT

    MOTION|Exercise EXERCISE - 3 SECTION -A (Previous Year Problems (NEET ))|38 Videos

  • PHOTOELECTRIC EFFECT

    MOTION|Exercise QUESTIONS FOR PRACTICE|12 Videos

  • OPTICS

    MOTION|Exercise Exercise|45 Videos

  • PROJECTILE MOTION

    MOTION|Exercise EXERCISE-3 (SECTION-B)|8 Videos

Similar Questions

Explore conceptually related problems

The kinetic energy of an electron is E when the incident wavelength is lamda To increase ti KE of the electron to 2E, the incident wavelength must be

Maximum kinetic energy of a photoelectron is E when the wavelength of incident light is lambda . If energy becomes four times when wavelength is reduced to one thrid, then work function of the metal is

K.E. of photo electron is E when incident frequency is lambda_(1) . It is 2E when incident frequency is lambda_(2) . The relation between the wavelength is

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

The graph between the energy of photoelectrons E and the wavelength of incident light (lamda ) is

The kinetic energy of the most energetic photoelectrons emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from lamda_1 " to " lamda_2 The work function of the metal is

The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength lamda of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is

When light of wavelength lesser than 6000 Å is incident on a metal, electrons are emitted. The approximate work - function of the metal is :

A photoelectric material having work-function phi_(0) is illuminated with light of wavelength lamda(lamdalt(hc)/(4_(0))). The fastest photoelectron has a de Broglie wavelength lamda_(d). A change in wavelength of the incident light by Deltalamda results in a change Deltalamda_(d) in lamda_(d). Then the ration Deltalamda_(d)//Deltalamda is proportional to

MOTION-PHOTOELECTRIC EFFECT -EXERCISE-1 (OBJECTIVE QUESTIONS)
  1. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

    Text Solution

    |

  2. Two differenct photons of energies, 1 eV and 2.5 eV, fall on two ...

    Text Solution

    |

  3. The KE of the photoelectrons is E when the incident wavelength is (lam...

    Text Solution

    |

  4. The threshold wavelength of tungsten is 2300 Å. If ultra voile...

    Text Solution

    |

  5. If the frequency of light in a photoelectric experiment is doubled the...

    Text Solution

    |

  6. The stopping potential for photo electrons does not depend on

    Text Solution

    |

  7. The work function for the surface of aluminium is 4.2 eV. What will be...

    Text Solution

    |

  8. Light of wavelength 3320 Å incidents on metal surface (work fun...

    Text Solution

    |

  9. Using light of wavelength 6000 Å stopping potential is obtained ...

    Text Solution

    |

  10. When light source is placed at 1 m distant from photo electric...

    Text Solution

    |

  11. In the given diagram if V represent the stopping potential and...

    Text Solution

    |

  12. Photoelectric current as a function of voltage V for different ...

    Text Solution

    |

  13. In the following figure the curves have been drawn between the...

    Text Solution

    |

  14. When monochromatic light of wavelength lambda illuminates a metal surf...

    Text Solution

    |

  15. If the wavelength of incident light decrease from lamda 1 ...

    Text Solution

    |

  16. The retarding potential for having zero photo - electron current

    Text Solution

    |

  17. In photoelectric effect work function of any metal is 2.5 eV. ...

    Text Solution

    |

  18. When ultraviolet light of wavelength 100 nm is incident upon silver pl...

    Text Solution

    |

  19. Slope of V(0) vs v curve is (where V(0)= Stopping potential, v=subject...

    Text Solution

    |

  20. Figure represents the graph of photo current I versus applied ...

    Text Solution

    |