A-Level Physics · 21 Alternating currents
Alternating currents for A-Level Physics
Alternating currents is mapped to 21 Alternating currents 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
21 Alternating currents
- Curriculum
- Cambridge International AS & A Level Physics
- Theme or group
- A Level extension
- Current framework
- Examinations in 2025–2027 · Version 1
R.m.s. values, rectification and smoothing are lesson 19.7; generators and transformers are lesson 19.4.
Mastery checklist
Know what success looks like.
- 01
Identify nodes and branches before applying any circuit equation.
- 02
Use charge and energy conservation at the correct part of the network.
- 03
Check polarity, current direction, units, and the behaviour of limiting component values.
Exam lens
Build, apply, check.
21 Alternating currents sits inside A Level extension. Build the concept first, then practise selecting a model, showing working, and checking the final result.
Teaching sequence
21 Alternating currents
This curriculum row maps directly to one GioPhysics concept guide.
- 01Alternating currentsCurrent guide