IGCSE Physics / Electric motors and electromagnetic induction

Generating electricity: the a.c. generator

Edexcel International GCSE Physics (4PH1), chapter 21: Electric motors and electromagnetic induction, specification point 6.16. Part of the full course.

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An a.c. generator uses electromagnetic induction to produce a voltage as a coil or magnet turns. The voltage reverses every half turn, and turning faster increases both the peak voltage and the frequency.

More lessons in Electric motors and electromagnetic induction

• The motor effect
• Fleming's left-hand rule
• The simple d.c. electric motor
• The loudspeaker
• Electromagnetic induction
• Transformers
• Transformer calculations
• Transmitting electricity: why the voltage is stepped up