This memory aid covers Memory Aids 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 10 of 14 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 10 of 14
Practice
13 questions
Recall
12 flashcards
🧠 Memory Aids
Faraday's key insight: "Move it, change it, generate it." The field must CHANGE near the conductor to induce a current. Still = nothing. Moving = current.
Generator vs motor:
- Generator: you give it spin, it gives you electricity (G = give spin → get electricity)
- Motor: you give it electricity, it gives you spin (M = money in → movement out)
Lenz's law — "nature is lazy and opposes change": The induced current always makes life harder for whatever is causing it. Push a magnet in — current pushes back. This is nature "resisting" change to conserve energy.
Ways to increase induced EMF — FAST:
- Faster movement
- Area of coil larger
- Stronger magnet
- Turns of coil more
Quick Check: List three ways to increase the induced EMF in a generator.
Any three from: (1) Rotate the coil faster / move the magnet faster. (2) Use a stronger magnet. (3) Increase the number of turns in the coil. (4) Increase the area of the coil.