A-Level Physics · 20 Magnetic fields
Magnetic fields and field lines for A-Level Physics
Magnetic fields and field lines is mapped to 20 Magnetic fields in the Cambridge International AS & A Level Physics pathway. Use this public guide to see exactly where the concept fits, what to master, and which GioPhysics resource continues the study sequence.
Where this fits
20 Magnetic fields
- Curriculum
- Cambridge International AS & A Level Physics
- Theme or group
- A Level extension
- Current framework
- Examinations in 2025–2027 · Version 1
Fields and forces are in Chapter 27, with the Hall effect and velocity selectors in lesson 18.6; induction is in Chapter 28.
Mastery checklist
Know what success looks like.
- 01
Identify the source of the field and distinguish field direction from force direction.
- 02
Use vector superposition or flux reasoning without dropping signs or geometry.
- 03
Connect the field model to force, energy, or induced e.m.f. in the mapped situation.
Exam lens
Build, apply, check.
20 Magnetic fields sits inside A Level extension. Build the concept first, then practise selecting a model, showing working, and checking the final result.
Teaching sequence
20 Magnetic fields
This syllabus point maps to 8 ordered concept guides.
- 01Magnetic fields and field linesCurrent guide
- 02Force on a current-carrying conductor
- 03Force on moving charges
- 04Hall effect and velocity selection
- 05Magnetic fields due to currents
- 06Magnetic flux and flux linkage
- 07Faraday's law
- 08Lenz's law