Home
Class 12
PHYSICS
When a point source of light is at a dis...

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

When a point source 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

B

`V`

C

`V//2`

D

`V//4`

Text Solution

Verified by Experts

The correct Answer is:
A
By changing distance of source , photoelectric current changes . But there is no change in stopping potential.
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 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

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 source of light is placed at a distance of 1 m from a photo cell and the cut off potential is found to be 5 V. If the source is kept at 1.5 m from the cell, then the cut off potential will be

A source of light is placed at a distance of 1m. From a photocell and the cut off potential is found to be V_0. If the distance is doubled what will be the cut off potential?

when a monochromatic point source of light is at a distance 0.2 m from a photoelectric cell, the saturation current and cut-off voltage are 12.0 mA and 0.5 V. If the same source is placed 0.4 m away from the photoelectric cell, then the saturation current and the stopping potential respectively are

When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the cut off voltage and the saturation current are respectively 0.6 V and 18.0 mA. If the same source is placed 0.6 m away from the photoelectric cell, then (a) the stopping potential will be 0.2 V (b) the stopping potential will be 0.6 V (c ) the saturation current will be 6.0 mA (d) the saturation current will be 2.0 mA

When a monochromatic point source of light is at a distance of 0.2 m from a photoelectron cell the cut off voltage and the saturation currect are respectively 0.6V and 18.0 mA if the same is plased 0.6 m away from the photoelectric cell , then

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. A photocell stoops emission if it is maintained at 2 V negative potent...

    Text Solution

    |

  2. Assuming photoemission to take place , the factor by which the maximum...

    Text Solution

    |

  3. When a point source of light is at a distance of one metre from a phot...

    Text Solution

    |

  4. If the work function of a metal is 'phi' and the frequency of the inci...

    Text Solution

    |

  5. Light of wavelength lambda strikes a photo - sensitive surface and ele...

    Text Solution

    |

  6. Light of wavelength 5000 Å falls on a sensitive plate with photoelectr...

    Text Solution

    |

  7. If the work function of a photo - metal is 6.825 eV. Its threshold wav...

    Text Solution

    |

  8. Work function of a metal is 2.1 eV. Which of the waves of the followin...

    Text Solution

    |

  9. The frequency of incident light falling on a photosensitive metal plat...

    Text Solution

    |

  10. When light of wavelength 300 nm (nanometre) falls on a photoelectric e...

    Text Solution

    |

  11. Threshold wavelength for photoelectric effect on sodium is 5000 Å . It...

    Text Solution

    |

  12. What is the stopping potential when the metal with work function 0.6 e...

    Text Solution

    |

  13. The work functions for sodium and copper are 2 eV and 4 eV . Which of ...

    Text Solution

    |

  14. For intensity I of a light of wavelength 5000 Å the photoelectron satu...

    Text Solution

    |

  15. Light of frequency 8 xx 10^(15) Hz is incident on a substance of photo...

    Text Solution

    |

  16. The lowest frequency of light that will cause the emission of photoele...

    Text Solution

    |

  17. Lights of two different frequencies whose photons have energies 1 and ...

    Text Solution

    |

  18. Sodium and copper have work functions 2.3 eV and 4.5 eV respectively ....

    Text Solution

    |

  19. When radiation is incident on a photoelectron emitter, the stopping po...

    Text Solution

    |

  20. Light of frequency 4 v(0) is incident on the metal of the threshold fr...

    Text Solution

    |