INSULATOR

Insulator

An electrical insulator is a material whose internal electric charges do not flow freely, and therefore does not conduct an electric current under the influence of an electric field. A perfect insulator does not exist, but some materials such as glass, paper and Teflon, which have high resistivity, are very good electrical insulators. A much larger class of materials, even though they may have lower bulk resistivity, are still good enough to insulate electrical wiring and cables. Examples include rubber-like polymers and most plastics. Such materials can serve as practical and safe insulators for low to moderate voltages .

The above text is a snippet from Wikipedia: Insulator (electricity)
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insulator

Noun

  1. A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).
  2. A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)
    To isolate electrical wires from the pylons supporting them, one often uses glass insulators.


The above text is a snippet from Wiktionary: insulator
and as such is available under the Creative Commons Attribution/Share-Alike License.

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