GCSE Physics (AQA)

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Induced Potential Difference

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Magnetism and electromagnetism Induced potential, transformers and the National Grid

Induced Potential Difference

4:07 The Generator Effect
Spec 4.7.3.1
Previous Electromagnetic Flow Meter Next The Generator Effect
  • A potential difference is induced when a conductor moves through a magnetic field.
  • Induced means created by something.
  • Demonstrated by waving a conductor between two magnetic poles.
  • Magnetic materials experience a force in the magnetic field region.
  • Moving a conductor through the field lines induces a potential difference between its ends.
  • Potential difference (pd) allows current flow if part of a circuit.
  • Induced potential difference lasts only while the conductor is moving.
  • Continuous movement of the conductor results in a constantly alternating potential difference.
  • A potential difference can also be induced by moving a magnetic field around a conductor.
  • Relative motion between the conductor and field is necessary for inducing potential difference.
  • No induced potential difference when a conductor moves parallel to the field lines.
  • A change in the magnetic field can induce a potential difference without motion.
  • Switching magnetic poles or changing flux density can induce potential difference.

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