4.2.8

Electrical Conductors - Electrons

Test yourself

Electrical Conductors - Electrons

The free electrons inside electrical conductors explain why they can conduct electricity.

Illustrative background for Electrical conductorsIllustrative background for Electrical conductors ?? "content

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.
Illustrative background for Electrical insulatorsIllustrative background for Electrical insulators ?? "content

Electrical insulators

  • An electrical insulator has no free electrons.
  • No charges are free to move and carry a current.

Jump to other topics

1Motion, Forces & Energy

1.1Physical Quantities & Measurement Techniques

1.2Motion

1.3Mass & Weight

1.4Density

1.5Forces: Effects of Forces

1.6Forces: Turning Effects of Forces

1.7Forces: Centre of Gravity

1.8Momentum

1.9Energy, Work, & Power: Energy

1.10Energy, Work & Power: Work

1.11Energy, Work & Power: Energy Resources

1.12Energy, Work & Power: Power

1.13Pressure

2Thermal Physics

3Waves

4Electricity & Magnetism

4.1Simple Phenomena of Magnetism

4.2Electrical Quantities: Electric Charge

4.3Electrical Quantities: Electric Current

4.4Electromotive Force & Potential Difference

4.5Electrical Quantities: Resistance

4.6Electrical Energy & Electrical Power

4.7Electric Circuits: Circuit Diagrams & Components

4.8Electric Circuits: Series & Parallel Circuits

4.9Electric Circuits: Action & Use

4.10Electrical Safety

4.11Electromagnetic Effects: Electromagnetic Induction

4.12Electromagnetic Effects: The A.C. Generator

4.13Magnetic Effect of a Current

4.14Force on a Current-Carrying Conductor

4.15Electromagnetic Effects: The D.C. Motor

4.16Electromagnetic Effects: The Transformer

5Nuclear Physics

6Space Physics

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