MagnetismTopic Summary
Topic Summary: Electromagnetic Induction
Part of Electromagnetic Induction — GCSE Physics
This topic summary covers Topic Summary: Electromagnetic Induction within Electromagnetic Induction for GCSE Physics. Revise Electromagnetic Induction in Magnetism for GCSE Physics with 13 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 14 of 14 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 14 of 14
Practice
13 questions
Recall
12 flashcards
Topic Summary: Electromagnetic Induction
Key Principles
- Changing magnetic flux → induced EMF → current (if circuit complete)
- Static field = no induction
- Lenz's law: induced current opposes the change
- Energy conserved: work in = electrical energy out
Increasing Induced EMF
- Faster movement
- Stronger magnet
- More turns of wire
- Larger coil area
Generator Key Facts
- Coil rotates in magnetic field
- Slip rings + brushes → AC output
- EMF max when coil parallel to field
- EMF zero when coil perpendicular to field
- Kinetic energy → electrical energy
Generator vs Motor
- Generator: motion → electricity (slip rings)
- Motor: electricity → motion (split-ring)
- Same structure, reverse energy flow
- Generator uses induction; motor uses motor effect