Learning objective

(HT only) Apply MS 3b and MS 3c when using the motor-effect equation.

Read the explanation, check the common trap, then practise with flashcards and questions.

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At a glance

Flashcards

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Topic

The motor effect

Subtopic

Fleming's left-hand rule (HT only)

AQA GCSE PhysicsMagnetism and electromagnetism

Study support

Understand this objective

Short explanation

(HT only) Apply MS 3b and MS 3c when using the motor-effect equation. sits within Fleming's left-hand rule (HT only) in AQA GCSE Physics Unit 4.7 Magnetism and electromagnetism. A strong explanation names the exact magnetic context, then links the observation to field direction, current, force, coil turns, induced potential difference or transformer power as appropriate. For this objective, revise the keywords HT only and use them as evidence rather than as isolated definitions. Keep the boundary precise: permanent magnets are not induced magnets, motors use current to produce force or motion, generators use motion or changing magnetic fields to induce a potential difference, and transformers compare primary and secondary coils. The distinctive exam cue is lo47cue343 fieldmap343 coilpath343 transformerlink343, which separates this learning objective from neighbouring transformer, motor-effect and magnetic-field objectives while preserving the official wording.

Key concepts

Fleming's left-hand rule (HT only) direction cue 97Fleming's left-hand rule (HT only) cause cue 98

Why it matters

This objective helps connect Fleming's left-hand rule (HT only) to exam-style questions, flashcards, and revision notes for The motor effect.

Common mistakes

1 linked

motor-effect force direction: avoid motors and generators: Instead, identify the exact Unit 4.7 idea in Fleming's left-hand rule (HT only), then explain how it links to a steel core electromagnet demonstration and the objective to apply MS 3b and MS 3c when using the motor-effect equation.

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