IP Physics Notes (Upper Secondary, Year 3-4): 16) Electromagnetic Induction
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Apply Faraday and Lenz, sketch AC generator waveforms, and compute transformer ratios for power transmission questions.
Last updated 30 Nov 2025
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- Start Here
- Faraday's & Lenz's Laws
- Induction Setups
- Alternating-Current Generator
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.
Start Here
| Read time | What to take away |
| 1 second | Induction happens when magnetic flux changes. |
| 10 seconds | Faster motion, stronger magnets, or more coil turns increase induced emf. Lenz's law says the induced current opposes the change that caused it. |
| 100 seconds | Use the generator and transformer sections to practise explaining flux change, predicting polarity, sketching AC output, and applying voltage-turns ratios. |
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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
