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vacuum arc | A Wisdom Archive on vacuum arc | | vacuum arc A selection of articles related to vacuum arc | |
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| ARTICLES RELATED TO vacuum arc | | | |  vacuum arc: Encyclopedia II - Electrical conduction - Solids including insulating solidsIn crystalline solids, atoms interact with their neighbors, and the energy levels of the electrons in isolated atoms turn into bands. Whether a material conducts or not is determined by its band structure. Electrons, being fermions, follow the Pauli exclusion principle, meaning that two electrons cannot occupy the same state. Thus electrons in a solid fill up the energy bands up to a certain level, called the Fermi energy. Bands which are completely full of electrons cannot conduct electricity, because there is no state of nearby ener ...
See also:Electrical conduction, Electrical conduction - Solids including insulating solids, Electrical conduction - Metals, Electrical conduction - Semiconductors, Electrical conduction - Superconductors, Electrical conduction - Electrolytes, Electrical conduction - Gases and plasmas, Electrical conduction - Vacuum Read more here: » Electrical conduction: Encyclopedia II - Electrical conduction - Solids including insulating solids |
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| | | | vacuum arc: Encyclopedia II - Spark gap - Spark gaps as protective devices Spark gaps are frequently used to prevent voltage surges from damaging equipment.
Spark gaps are used in high-voltage switches, for example, in power plants and electrical substations. Such switches are constructed with a large, remote-operated switching blade with a hinge as one contact and two leaf springs holding the other end as second contact. If the blade is opened, a spark may keep the connection between blade and spring conducting. (The spark ionizes the air, which becomes conductive, allowing an arc to form, which sustains io ...
See also:Spark gap, Spark gap - Spark gaps as ignition devices, Spark gap - Spark gaps as radio transmitters, Spark gap - Spark gaps as protective devices, Spark gap - Spark gaps as power-switching devices, Spark gap - Spark gaps as entertainment, Spark gap - Spark gaps in nature Read more here: » Spark gap: Encyclopedia II - Spark gap - Spark gaps as protective devices |
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| | | | vacuum arc: Encyclopedia II - Electrical conduction - Gases and plasmas In neutral gases, electrical conductivity is very low. They act as a dielectric or insulator, up until the electric field reaches a breakdown value, freeing the electrons from the atoms in an avalanche process thus forming a plasma. This plasma provides mobile electrons and positive ions, acting as a conductor which supports electric currents and forms a spark, arc or lightning. In ordinary air below the breakdown field, the dominant source of electrical conduction is via ...
See also:Electrical conduction, Electrical conduction - Solids including insulating solids, Electrical conduction - Metals, Electrical conduction - Semiconductors, Electrical conduction - Superconductors, Electrical conduction - Electrolytes, Electrical conduction - Gases and plasmas, Electrical conduction - Vacuum Read more here: » Electrical conduction: Encyclopedia II - Electrical conduction - Gases and plasmas |
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| | | | vacuum arc: Encyclopedia II - Electrical conduction - Electrolytes Electric currents in electrolytes are flows of electrically charged atoms (ions). For example, if an electric field is placed across a solution of Na+ and Cl–, the sodium ions will move constantly towards the negative electrode (cathode), while the chlorine ions will move towards the positive electrode (anode). If the conditions are right, redox reactions will take place at the electrode surfaces, releasing electrons from the chlorin ...
See also:Electrical conduction, Electrical conduction - Solids including insulating solids, Electrical conduction - Metals, Electrical conduction - Semiconductors, Electrical conduction - Superconductors, Electrical conduction - Electrolytes, Electrical conduction - Gases and plasmas, Electrical conduction - Vacuum Read more here: » Electrical conduction: Encyclopedia II - Electrical conduction - Electrolytes |
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