Electronics Engineering - What is Edison Effect?

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What is Edison Effect?

Total Answers and Comments: 2

Last Update: May 14, 2008 Asked by: kiboneka

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Submitted by: santosh_soc

Edison Effect is also refferred as "Thermionic emission". Here the charge carriers flow from a charge-carrying surface due to vibrations caused by thermal energy.
This phenomenon can be seen in the house-hold electrical bulb in which is a metal filament is heated by the thermal energy from electricity.

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rohitjhaji

November 19, 2007 02:37:22

santosh_soc

Member Since: October 2007 Contribution: 4

RE: What is Edison Effect?

Edison Effect is also refferred as "Thermionic emission". Here the charge carriers flow from a charge-carrying surface due to vibrations caused by thermal energy.
This phenomenon can be seen in the house-hold electrical bulb in which is a metal filament is heated by the thermal energy from electricity.

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May 14, 2008 06:33:36

kirisave

Member Since: May 2008 Contribution: 3

RE: What is Edison Effect?

In a conducting material, the electrons are governed by Fermi-Dirac statistics. The baseline electron energy is the Fermi Energy*, and at low temperatures the electrons all exist at or below this level. As temperature is increased, so the distribution function for the electrons develops a high energy 'tail'. Some of these electrons have sufficient energy to pass over the surface potential barrier between the material and the vacuum. This process of increasing the temperature of a bulk material to increase the number of electrons which can leave the material is called thermionic emission or Edison effect.

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