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GCSE Physics · key term
A material through which electric charge can flow; a metal wire is a common example.
Used by Edexcel and OCR
Specification 12.8, 12.10 · Paper 2
Revise: Field Strength FactorsWhen an electric current flows through a conductor, it produces a magnetic field around the conductor. For a long, straight wire, the field surrounds the wire in concentric circles. This lesson is concerned with the strength of that field rather than its direction.
A material, such as a wire, through which electric charge can flow.
Use the complete trends: increasing the current strengthens the field; increasing the distance from the conductor weakens it.
State that the force acts on a current-carrying conductor, not merely on any wire near a magnet.
State both relationships explicitly: increasing the current makes the magnetic field stronger, while increasing the distance from the conductor makes it weaker.
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Specification P3.1b, P4.1f · Paper 1 (Foundation), Paper 3 (Higher)
A material, such as metal, through which electric charge can move easily.
Revise: Static electricity productionOn a conductor such as metal, charge moves easily and will usually flow away through your hand if you hold it while rubbing it. An isolated conductor can nevertheless retain charge: the metal dome of a Van de Graaff generator is supported by an insulator. Its moving belt transfers charge to the dome, allowing a large build-up.
Paper 1, Paper 2
A material, such as a wire, through which electric current can flow.