Electrical Conductors - Electrons
Physics: Edexcel IGCSE, topic 2.2.5
Electrical Conductors - Electrons
The free electrons inside electrical conductors explain why they can conduct electricity.
Electrical conductors
- An electrical conductor has lots of charges that are free to move.
- In a metal, the charges that are free to move are electrons.
- The electric current through the metal is the flow of these free electrons.
Electrical insulators
- An electrical insulator has no free electrons.
- No charges are free to move and carry a current.
Test yourself on Electrical Conductors - Electrons
What charges are free to move in metals?