Home
Class 12
PHYSICS
A photo cell is receiving light from a s...

A photo cell is receiving light from a source placed at a distance of `1 m`. If the same source is to be placed at a distance of `2 m` , then the ejected electron

Text Solution

Verified by Experts

The correct Answer is:
D
Number of ejected electrons `prop (1)/(( Distance)^(2))`
Therefore an increment of distance two times will reduce the number of ejected electrons to `(1)/(4) th` of the previous one.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise X-Rays|45 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Problems Based On Mixed Concepts|42 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Photo Momentum Energy|30 Videos

  • CURRENT ELECTRICITY

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise Section D - Chapter End Test|29 Videos

Similar Questions

Explore conceptually related problems

When a point source of light is at a distance of 50 cm from a photoelectric cell , the cut-off voltage is found to be V_(0) . If the same source is placed at a distance of 1 m from the cell , then the cut-off voltage will be

A photocell with a constannt potential differnce of V voolt across it, is illuminated by a point source from a distance of 25 cm. when the source is moved to a distance of 1 m, the electrons emitted by the photocell

When a point source of light is at a distance of one metre from a photo cell , the cut off voltage is found to be V . If the same source is placed at 2 m distance from photo cell , the cut off voltage will be

A photo cell is illuminated by a small bright source placed 1m away When the same source of light is placed 2m away, the electrons emitted by photo cathode

A photo-cell is illuminated by a source of light which is placed at a distance d from the cell . If the distance become d/2 . Then number of electrons emitted per seconed will be

When a point source of light is at a distnace of 1 m from a photo cell, the cut off voltage is is found to be V. if the same source is placed at 3m distance from photo cell, the cut of voltage will be

The distance between two coherent sources is 1 mm. The screen is placed at a distance of 1 m from the sources. If the distance of the third bright fringe is 1.2 mm from the central fringe, the wavelength of light used is

When a monochromatic source of light is at a distance of 0.2 m from a photocell, the stopping potential (cut off voltage) and the saturation current are found to be respectively 1 V and 27 mA. If the same source is placed at a distance 0.6 m from the cell, then

A2Z-DUAL NATURE OF RADIATION AND MATTER-Photo Electric Effect
  1. If intensity of incident light is increased in photo electric effect t...

    Text Solution

    |

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

    Text Solution

    |

  3. A photo cell is receiving light from a source placed at a distance of ...

    Text Solution

    |

  4. A point source of light is used in an experiment on photoelectric effe...

    Text Solution

    |

  5. A photon energy 3.4 eV is incident on a metal having work function 2 e...

    Text Solution

    |

  6. Photons of energy 6 eV are incident on a metal surface whose work func...

    Text Solution

    |

  7. A metal surface of work function 1.07 eV is irradiated with light of w...

    Text Solution

    |

  8. When light falls on a metal surface , the maximum kinetic energy of th...

    Text Solution

    |

  9. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

    Text Solution

    |

  10. Threshold frequency for a metal is 10^(15) Hz. Light of lambda = 4000 ...

    Text Solution

    |

  11. If in a photoelectric experiment , the wavelength of incident radiatio...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  14. The stopping potential V for photoelectric emission from a metal surfa...

    Text Solution

    |

  15. In an experiment on photoelectric effect the frequency f of the incide...

    Text Solution

    |

  16. The work function of a metal is 1.6 xx 10^(-19) J. When the metal surf...

    Text Solution

    |

  17. Ultraviolet radiation of 6.2 eV falls on an aluminium surface (work -...

    Text Solution

    |

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

    Text Solution

    |

  19. The work function of a metallic surface is 5.01 eV. The photo - electr...

    Text Solution

    |

  20. Light of wavelength 4000 Å falls on a photosensitive metal and a negat...

    Text Solution

    |