Home
Class 11
PHYSICS
The number of photo - electrons emitted ...

The number of photo - electrons emitted per second from a metal surface increases when

A

the energy of incident photons increases.

B

the frequency of incident light increases.

C

the wavelength of the incident light increases.

D

the intensity of the incident light increases.

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Evaluation Test|19 Videos

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Critical thinking|22 Videos

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|16 Videos

Similar Questions

Explore conceptually related problems

The photoelectrons emitted from a metal surface:

A light beam of interest 3.01xx10^(-3) W m ^(-2) is incident normally on the square -sapped metal surface of side 1 cm and with work function 2 eV . The intensity of light is equal distributed among the three constituents' wavelength , 400 nm, 550 nm and 650 nm. Each photon emits one electron without any loss in the energy. The number of electrons emitted per second from the metal surface is

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is:

Photoelectrons emitted from a metallic surface are

When the energy of the incident radiation is increased by 20 % , kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV . The work function of the metal is

Photoelectrons emitted from a metallic surface are those which are

Assertion: A photosensitive surface is illuminated by a monochromatic light of wavelength lambda and intensity I. The number of photoelectrons emitted per second is doubled when the intensity of light is doubled. However, the maximum speed of emitted electrons remains unchanged. Reason: The number of electrons emitted per second is directly proportional to the intensity of the incident light. The kinetic energy of the emitted photoelectrons is independent of the intensity of the light.

Light of wavelength 5000 Å and intensity of 3.96 xx 10^(-3) watt//cm^(2) is incident on the surface of photo metal . If 1% of the incident photons only emit photo electrons , then the number of electrons emitted per unit area per second from the surface will be

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

TARGET PUBLICATION-ELECTRONS AND PHOTONS-Competitive Thinking
  1. One moving electron when comes closer to other stationary electron, th...

    Text Solution

    |

  2. In photoelectric effect, stopping potential depends on

    Text Solution

    |

  3. The number of photo - electrons emitted per second from a metal surfac...

    Text Solution

    |

  4. When the light source is kept 20 cm away from a photo cell, stopping p...

    Text Solution

    |

  5. As the intensity of incident light increases

    Text Solution

    |

  6. Threshold wavelength for lithium metal is 6250 Å. For photo emission, ...

    Text Solution

    |

  7. When yellow light is incident on a surface , no electrons are emitted ...

    Text Solution

    |

  8. The work function of metals is in the range of 2 eV to 5 eV. Find whic...

    Text Solution

    |

  9. In a photoelectric experiment, if both the intensity and frequency of ...

    Text Solution

    |

  10. An electron is accelerated through a potential difference of 1000 volt...

    Text Solution

    |

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

    Text Solution

    |

  12. In an X-ray tube , electrons bombarding the anode produce X-rays of wa...

    Text Solution

    |

  13. When potential difference of 9V is applied between the two plates, ele...

    Text Solution

    |

  14. The anode voltage of a photocell is kept fixed. The wavelength lambda ...

    Text Solution

    |

  15. The maximum kinetic energy of photoelectrons emitted from a surface w...

    Text Solution

    |

  16. The maximum kinetic energy of the photoelectrons depends only on

    Text Solution

    |

  17. Einstein's photoelectric equation states that E(k) = h v - W . In this...

    Text Solution

    |

  18. The energy of gamma (gamma) ray photon is E(gamma) and that of an X-ra...

    Text Solution

    |

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

    Text Solution

    |

  20. Light of wavelength A which is less than threshold wavelength is incid...

    Text Solution

    |