Home
Class 11
PHYSICS
A 5 W source emits monochromatic light o...

A `5 W` source emits monochromatic light of wavelength `5000 Å`. When placed `0.5 m` away , it liberates photoelectrons from a photosensitive metallic surface . When the source is moved to a distance of `1.0 m` the number of photoelectrons liberated will be reduced by a factor of

A

8

B

16

C

2

D

4

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DISHA|Exercise PHYSICS|45 Videos

  • ELECTRIC CHARGE AND FIELDS

    DISHA|Exercise Physics|42 Videos

Similar Questions

Explore conceptually related problems

A photoelectric cell is illuminated by a point source of light 1 m away . When the source is shifted to 2 m then

When a point light source, of power W , emiting monochromatic light of wavelength lambda is kept at a distance a from a small photosensitive surface of work function phi and area S . Then

A 100 W point source emits monochromatic light of wavelength 6000 A Q. Calculate the photon flux (in SI unit) at a distance of 5m from the source. Given h=6.6xx10^(34) J s and c=3xx10^(8)ms^(-1)

A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then

DISHA-DUAL NATURE OF MATTER AND RADIATION-PHYSICS
  1. The maximum kinetic energy of the photoelectrons ejected from a photoc...

    Text Solution

    |

  2. The work functions of metals A and B are in the ratio 1 : 2. If light ...

    Text Solution

    |

  3. Which one of the following graphs represents the variation of maximum ...

    Text Solution

    |

  4. The potential difference that must be applied to stop the fastest phot...

    Text Solution

    |

  5. X- rays are produced in an X- rays tube operating at a given accelerat...

    Text Solution

    |

  6. Electrons used in an electron microscope are accelerated by a voltage ...

    Text Solution

    |

  7. In the Davisson and Germer experiment , the velocity of electrons emit...

    Text Solution

    |

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

    Text Solution

    |

  9. Photoelectric emission is observed from a metallic surface for frequen...

    Text Solution

    |

  10. Which of the following is/are false regarding cathode rays?

    Text Solution

    |

  11. The ratio of the respective de Broglie wavelengths associated with ele...

    Text Solution

    |

  12. A 5 W source emits monochromatic light of wavelength 5000 Å. When plac...

    Text Solution

    |

  13. In the photoeletric effect, electrons are emitted

    Text Solution

    |

  14. The threshold frequency of a certain metal is 3.3xx10^(14)Hz. If light...

    Text Solution

    |

  15. In an experiment on photoelectric effect, a student plots stopping pot...

    Text Solution

    |

  16. White X-rays are called 'white' due to the fact that:

    Text Solution

    |

  17. The wavelength associated with an electron accelerated through a poten...

    Text Solution

    |

  18. Monochromatic light of frequency 6.0 xx 10^(14) Hz is produced by a la...

    Text Solution

    |

  19. The de-Broglie wavelength of neutron in thermal equilibrium at tempera...

    Text Solution

    |

  20. Which of the following cannot be explained on the basis of photoelectr...

    Text Solution

    |