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Can electricity arc in a vacuum?

Frequently Asked Questions

Can electricity arc in a vacuum?

Electricity can arc in a vacuum, but the conditions and mechanisms differ significantly from arcing in air or other media. In a vacuum, there are no gas molecules to ionize and conduct electricity in the usual sense. However, electricity can still travel through a vacuum via thermionic emission or field emission. Thermionic emission occurs when heat causes electrons to be emitted from a material, while field emission can happen at very high electric fields that pull electrons out of a surface. Specialized equipment and high voltages are often required to achieve electrical arcing in a vacuum. This principle is utilized in vacuum tubes and certain types of electronic devices where controlled arcing or electron flow in a vacuum is desired for their operation.

Can electricity arc in a vacuum?

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