Home
Class 12
PHYSICS
What is saturation current?...

What is saturation current?

Text Solution

Verified by Experts

The maximum value of photoelectric current obtained by increasing the accelerating positive potential is called saturation current. Saturation current is proportional to intensity of incident radiation.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise CONTINUOUS EVALUATION (ASSIGNMENT)|4 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise PREVIOUS YEAR QUESTIONS|4 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    NEW JOYTHI PUBLICATION|Exercise PRACTICE PROBLEMS FOR SELF ASSESSMENT|5 Videos
  • CURRENT ELECTRICITY

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos
  • ELECTRIC CHARGES AND FIELDS

    NEW JOYTHI PUBLICATION|Exercise Competitive Exam Corner|20 Videos

Similar Questions

Explore conceptually related problems

What is called reverse saturation current ?

The saturation current is proportional to the "____________" of the radiation.

The saturation current in a triode valve can be changed by changing

The saturation current from a thoriated-tungsten cathode at 2000 K is 100 mA . What will be the saturation current for a pure-tungsten cathode of the same surface area operating at the same temperature? The constant A in the Richardson-Dushman equation is 60 xx 10^4 A m^(-2) K^(-2) for pure tungsten and 3.0 xx 10^(4) A m^(-2) K^(-2) for thoriated tungsten. The work function of pure tungsten is 4.5 eV and that of thoriated tungsten is 2.6 eV .

The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate . Light source is put on and a saturation photo current is recorded . An electric field is switched on which has a vertically downward direction . Then

The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate . Light source is put on and a saturation photo current is recorded . An electric field is switched on which has a vertically downward direction . Then

An NPN BJT having reverse saturation currents I_S=10^(-15) A is biased in the forwared active region with V_BE =700mV and the current gain (beta) may vary from 50 to 150 due to manufacturing variation. What is the maximum emitter currents(in mu A).

A point source causes photoelectric effect from a small metal plate. Which of the curves in Fig. may represent the saturation photo-current as a function of the distance between the source and the metal?

NEW JOYTHI PUBLICATION-DUAL NATURE OF RADIATION AND MATTER -EVALUATION QUESTIONS AND ANSWERS
  1. a. The wave nature of matter is not noticeable in our daily observati...

    Text Solution

    |

  2. What do the graphs represent?

    Text Solution

    |

  3. Which of the following statements are is not correct about a photon?

    Text Solution

    |

  4. a. Every metal has a definite work function. Why all photoelectrons ...

    Text Solution

    |

  5. Eventhough metals have free electrons, they cannot escape from metal ...

    Text Solution

    |

  6. Define 1 eV.

    Text Solution

    |

  7. What are the factors on which the rate of thermionic emission depends?

    Text Solution

    |

  8. Does photoelectric effect violate the law of conservation of energy?

    Text Solution

    |

  9. Give examples for metals sensitive to UV rays and then for visible lig...

    Text Solution

    |

  10. Why is photocurrent proportional to intensity?

    Text Solution

    |

  11. What is saturation current?

    Text Solution

    |

  12. How does a fire alarm work?

    Text Solution

    |

  13. Does wave theory give proper explanation for photoelectric effect?

    Text Solution

    |

  14. Why is light not deflected by electric and magnetic fields?

    Text Solution

    |

  15. Why are alkali metal most suited for photoelectric emission?

    Text Solution

    |

  16. Why wooden surface does not exhibit photoelectric effect?

    Text Solution

    |

  17. A fast moving bullet is not diffracted by a crystal surface, while an ...

    Text Solution

    |

  18. An electron and a proton have same speed. How are their wavelength rel...

    Text Solution

    |

  19. Millikan verified Einstein's photoelectric equation. How?

    Text Solution

    |

  20. If a proton and electron have the same de-Broglie wavelength, then

    Text Solution

    |