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A Level Physics · Topic hub

Electromagnetic Induction

A Level Electromagnetic Induction hub covering magnetic flux and linkage, Faraday’s and Lenz’s laws, motional e.m.f., simple applications and ideal transformers.

  • H2 Physics 9478
  • 14 lessons
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Before you begin

Follow the lesson route in order when the topic is new. If you are revising, begin with the topic check and return to the lesson it identifies.

How the ideas connect

  1. Magnetic flux
  2. Faraday's law
  3. Lenz's law
  4. Alternating currents

Learn in order

Lesson route

01

Learning path

  1. 01Magnetic FluxUse magnetic flux and flux-linkage relationships.
  2. 02Faraday's and Lenz's LawsApply Faraday's and Lenz's laws to induced e.m.f. and direction.
  3. 03E.m.f. Induced in a Moving ConductorExplain simple applications of electromagnetic induction, including motional e.m.f. and eddy currents.
  4. 04Eddy CurrentsExplain simple applications of electromagnetic induction, including motional e.m.f. and eddy currents.
  5. 05Features of an A.C. TransformerExplain simple iron-core transformer operation and apply ideal transformer ratios.
  6. 06Ideal Transformer Operation and RatiosExplain simple iron-core transformer operation and apply ideal transformer ratios.
  7. 07Seven-step Induction WorkflowUse magnetic flux and flux-linkage relationships.
  8. 08Transformer Energy LossesExplore transformer design and induction-device contexts beyond the core syllabus.
  9. 09Power DistributionExplore transformer design and induction-device contexts beyond the core syllabus.
  10. 10Induction StoveExplore transformer design and induction-device contexts beyond the core syllabus.
  11. 11The Electric GuitarExplore transformer design and induction-device contexts beyond the core syllabus.
  12. 12Subway Braking SystemExplore transformer design and induction-device contexts beyond the core syllabus.
  13. 13Movement SensorsExplore transformer design and induction-device contexts beyond the core syllabus.
  14. 14Ground Fault InterruptersExplore transformer design and induction-device contexts beyond the core syllabus.

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Practice and repair

Recommended next stepElectromagnetic Induction topic checkFind the exact ideas that need another look.Start topic check

Other ways to practise

Key ideas and reference

Use this concise Electromagnetic Induction checklist for orientation. Open a linked lesson for definitions, derivations, diagrams and worked examples.

  • Use magnetic flux and flux-linkage relationships.
  • Explore transformer design and induction-device contexts beyond the core syllabus.
Course coverage and review details

This hub groups the reviewed Electromagnetic Induction lesson route.

Use the course context above when choosing qualification-specific practice and evidence.

Reviewed Jul 20, 2026

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Frequently asked questions

What should I know before electromagnetic induction?

Know magnetic flux density, field direction rules, a.c. quantities and how to interpret the gradient of a graph.

When is an e.m.f. induced?

An e.m.f. is induced when magnetic flux linkage changes. A large rate of change or more linked turns produces a larger magnitude.

What does Lenz's law oppose?

The induced effect opposes the change in magnetic flux linkage that produces it, not necessarily the existing field or the motion by itself.

What should I do after this hub?

Take the induction quiz and structured set, then continue to Quantum Physics.