GCSE Physics (AQA)

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Generator Effect in a Transformer

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Magnetism and electromagnetism Induced potential, transformers and the National Grid

Generator Effect in a Transformer

3:12 Transformers
Spec 4.7.3.1 4.7.3.4
Previous Parts of a Transformer Next Potential Difference in Transformers
  • Transformers use induced magnetic fields and the generator effect to transfer alternating current.
  • They change the potential difference of a current.
  • An alternating current source in the primary coil produces an output alternating current with a different potential difference in the secondary coil.
  • The process involves inducing a changing magnetic field around the primary coil.
  • The direction of the induced field depends on the current's direction, which changes periodically with alternating current.
  • The iron core is magnetized, carrying the changing magnetic field to the secondary coil without loss of strength.
  • The changing magnetic field induces an alternating current in the secondary coil due to the generator effect.
  • The generator effect occurs when a magnetic field induces a potential difference and current in a conductor.
  • Transformers do not work with direct currents as no generator effect occurs without a changing field.
  • The number of turns in the secondary coil affects the potential difference of the output.

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