IP Physics Notes (Upper Secondary, Year 3-4): 16) Electromagnetic Induction
Download printable cheat-sheet (CC-BY 4.0)30 Sep 2025, 00:00 Z
Reviewed by
Chee Wei Jie·Academic Advisor (Physics)
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Q: What does IP Physics Notes (Upper Secondary, Year 3-4): 16) Electromagnetic Induction cover?
A: Apply Faraday and Lenz, sketch AC generator waveforms, and compute transformer ratios for power transmission questions.
Quick recap -- Changing magnetic flux induces emf. Remember: faster change -> larger emf, and the induced current always opposes the flux change (Lenz). Generators and transformers are direct applications.
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These notes align with SEAB GCE O-Level Physics (6091) content used in IP programmes (exams from 2026).
Status: SEAB O-Level Physics 6091 syllabus (exams from 2026) checked 2025-11-30 - scope unchanged; remains the reference for these notes.
Faraday's & Lenz's Laws
- Faraday: magnitude of induced emf is proportional to rate of change of magnetic flux linkage.
- Lenz: induced current direction opposes the change producing it (conservation of energy).
- Practical consequences:
- Move magnet faster -> larger .
- Use stronger magnet or more coil turns -> larger
