CourseCourse QuestionQuestion

Cambridge International AS & A Level Physics (9702)

12. Motion in a circle

13. Gravitational fields

14. Temperature

15. Ideal gases

16. Thermodynamics

17. Oscillations

18. Electric fields

19. Capacitance

20. Magnetic fields

21. Alternating currents

21.1 Characteristics of alternating currents

21.1.1—The terms period, frequency and peak value as applied to an alternating

21.1.2—Equations of the form x = x0 sin ωt representing a sinusoidally alternating

21.1.3—The fact that the mean power in a resistive load is half the maximum power

21.1.4—Root-mean-square (r.m.s.) and peak values and recall and use I r.m.s. = I0 /

21.2 Rectification and smoothing

22. Quantum physics

23. Nuclear physics

24. Medical physics

25. Astronomy and cosmology

Practical assessment skills

Mathematical, data, formula and circuit-symbol skills

A-Level/CAIE/Physics//A2/Concept/21. Alternating currents/21.1 Characteristics of alternating currents/21.1.4—Root-mean-square (r.m.s.) and peak values and recall and use I r.m.s. = I0 /

21. Alternating currents

Syllabus: 9702–2028–2029
Section: 21
Level: A2

Exam analysis

Most tested topics

Characteristics of alternating currents
Rectification and smoothing