This exam focus covers Exam Focus within The Motor Effect for GCSE Physics. Revise The Motor Effect in Magnetism for GCSE Physics with 18 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 11 of 13 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 11 of 13
Practice
18 questions
Recall
12 flashcards
🎯 Exam Focus
Frequently Examined
Motor effect questions appear regularly, especially at higher tier:
- Fleming's Left-Hand Rule (2 marks): Given two of the three directions (current, field, force), find the third. Practice using the actual hand rule.
- F = BIL calculation (3 marks): Straightforward substitution. Show working, give units (N).
- DC motor explanation (3-4 marks): Explain the role of the commutator — reverses current every half turn to maintain continuous rotation.
- How to increase motor speed (2 marks): More current, stronger magnets, more turns. Explaining each earns marks.
- "What happens if current reverses?" (2 marks): Force reverses direction — motor spins in opposite direction.