Physics 9702 · 21 Alternating currents
21.1 Characteristics of alternating currents
Define alternating current terms, relate r.m.s. to peak values, and calculate mean power.
- Questions
- 42
- Years
- 2015–2026
- Multiple choice
- 2
- Written answer
- 40
- Average marks
- 7.6
Practise alternating currents questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 4variants 41, 42, 43, 4440
- Paper 1variants 11, 122
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 1 | 3 | – | 4 |
| 2025 | – | – | 1 | 1 |
| 2023 | 1 | – | 3 | 4 |
| 2022 | 1 | – | 3 | 4 |
| 2021 | 1 | 1 | 3 | 5 |
| 2020 | 1 | – | – | 1 |
| 2019 | 1 | 3 | 2 | 6 |
| 2018 | 1 | 2 | 1 | 4 |
| 2017 | 1 | – | 3 | 4 |
| 2016 | 1 | 4 | 1 | 6 |
| 2015 | – | 2 | 1 | 3 |
