Conductivity

Conductivity
Band

Conductivity

Experiment with conductivity in metals, plastics and photoconductors. See why metals conduct and plastics do not, and why some materials conduct only when a flashlight shines on them.

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Energy band of metals

Metals become electrically conductive because electrons can move freely through them across energy bands. The electrons of many nonmetals are difficult to move because the electrons fill the energy band.