SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ham-metals-free-electrons

Why are metals generally good conductors of electricity?

They have many free electrons that can move easily.

  1. They have many free electrons ✔
  2. They have many free protons
  3. They have relatively high density

Why: In metals, outer electrons are not tied to one atom. These free electrons can drift through the metal, which lets current flow easily.

Huh, didn't know that: Silver conducts slightly better than copper, but copper is much cheaper, so it is used for wire.

The dad joke
Why are copper wires so easy to get along with? They have no resistance to new ideas.
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Sources

  1. NCVEC 2026-2030 Technician Question Pool (Feb 19, 2026 release) https://www.ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf

Test yourself in the game

Ham RadioElectrical current is measured in which unit?Ham RadioA difference in what causes electrons to flow in a circuit?Ham RadioWhich of these is a good electrical insulator?

That's stuff everyone should know.