The directed motion of free electrons of the outer layer of conductive material , mainly metals, in one direction creating the known electricity.
Generally each oriented motion of charged particles creates an electric current.
The free electrons that is moving freely at high speeds in the body of metal and not randomly oriented. The generator of electricity or a battery move more electrons in the same direction rather than the opposite.
In DC this move is in the same direction while in the AC the direction alternates.
The best conductive metal is gold, followed by silver, copper and aluminium.
Gold and silver are very expensive and rare to use it widely. Aluminium is too soft for the short section wires, but ideal for thick cables that makes light and somewhat easy to work. The aluminum used in high voltage underground cables.
Copper has proved the best so far. Is the most prevalent metal in the transmission of electricity.
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