Key term for OCR GCSE Physics A, used in Powering Earth.
An electric current that periodically reverses its direction and changes its magnitude continuously with time.
Alternating current (a.c.) appears in OCR GCSE Physics A revision content for Global challenges, especially Powering Earth and Mains wires.
Global challenges
Powering Earth • Mains wires
Global challenges
Powering Earth • AC vs DC
Global challenges
Powering Earth • Domestic supply
Energy
Power and efficiency • Energy waste in devices
Magnetism and magnetic fields
Uses of magnetism • Alternators and dynamos
Magnetism and magnetic fields
Uses of magnetism • Microphones and speakers
Create a free account to access OCR GCSE Physics A revision notes, track progress, and practise related key terms.
