IB Physics D.4 Electromagnetic Induction | Concept Tutorial | GradePod (HL)

This is the HL concept tutorial for D.4 Electromagnetic Induction in the current IB Physics syllabus. D.4 is a Higher Level only topic. I take you through magnetic flux, flux linkage, Faraday's law, the AC generator, and Lenz's law, including how to use Fleming's right-hand rule to find the direction of an induced current. The concepts here are more abstract than most topics in IB Physics, but the exam questions are very pattern-driven once you know what to look for. As you watch, tick off each learning objective on the free checklist on the GradePod page below. 👉 Free checklist + full topic page: https://www.gradepod.com/topics/d4-induction It's a great way to track what you know and what still needs work. ━━━━━━━━━━━━━━━━━━━━━━━ WHAT'S COVERED IN THIS VIDEO ━━━━━━━━━━━━━━━━━━━━━━━ 0:00 Introduction: what electromagnetic induction is and why it matters 1:08 Magnetic flux, flux density and flux linkage: definitions and equations 6:55 Faraday's law: induced EMF as the rate of change of magnetic flux linkage 13:21 The AC generator: how rotating a coil produces a sinusoidal EMF 20:34 AC generator in detail: graphs of EMF and flux linkage with time 34:34 Lenz's law: conservation of energy and the direction of induced current 38:07 Fleming's right-hand rule: finding the direction of an induced current ━━━━━━━━━━━━━━━━━━━━━━━ WANT TO GO FURTHER? ━━━━━━━━━━━━━━━━━━━━━━━ The GradePod Exam Pack gives you everything you need to turn what you've just learned into marks: ✓ Revision note template (build your own notes as you watch, I reference it throughout this video) ✓ Knowledge questions for D.4 Electromagnetic Induction ✓ Topic-by-topic past paper questions with full mark schemes ✓ Full mock exam, annotated data booklet and Paper 1B practice One-time purchase. £39. Instant download. Every topic included. 👉 Get the Exam Pack: https://www.gradepod.com/exam-pack ━━━━━━━━━━━━━━━━━━━━━━━ NEXT STEP ━━━━━━━━━━━━━━━━━━━━━━━ Once you've watched this video and ticked off your checklist, your next step is the past paper walkthrough. Watch me work through real IB exam questions on Electromagnetic Induction, with full mark scheme guidance: 👉 D.4 Electromagnetic Induction Past Paper Video: https://www.youtube.com/watch?v=D1Oxz_WBtGg ━━━━━━━━━━━━━━━━━━━━━━━ ABOUT GRADEPOD ━━━━━━━━━━━━━━━━━━━━━━━ I'm Sally Weatherly, IB Physics teacher since 2004, Fellow of the Institute of Physics, and founder of GradePod. I built GradePod for the students I couldn't reach in the classroom. Every tutorial is free. No login, no catch. 👉 All 24 topics, free: https://www.gradepod.com/topics ━━━━━━━━━━━━━━━━━━━━━━━ #IBPhysics #IBPhysicsRevision #GradePod #IB #IB2025 #IBPhysicsHL #ElectromagneticInduction #FaradaysLaw #LenzLaw #ACGenerator