rOmV4 - Basics Conductors

Electrons are Free to Flow in Conductors. If there's a complete circuit and a potential difference, a current will flow.

These are materials where some of the electrons surrounding the atoms are free to move. Good conductors (all metals) have a very low resistance and many free electrons can move very easily. We usually assume the resistance is zero but in fact it is just very close to zero.

Examples

Poor conductors (carbon is a good example and some metal alloys and oxides) have a few free electrons and they move much less freely. These materials are used in resistors.

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