AQA A-Level Physics: Paper-by-Paper Exam Preparation

AQA A-Level Physics (7408) is assessed through three written papers, not tiered: Paper 1 (Sections 1-5 plus 6.1 Periodic motion, 2h, 85 marks, 34%), Paper 2 (Sections 6.2 Thermal Physics, 7 and 8, assuming knowledge from Sections 1-6.1, 2h, 85 marks, 34%), and Paper 3 (Section A compulsory practical skills and data analysis, 45 marks; Section B one optional topic from Astrophysics/Medical physics/Engineering physics/Turning points in physics/Electronics, 35 marks; 2h, 80 marks, 32%). These notes turn that structure into an exam-day plan, alongside the Measurements and Their Errors topic revision notes already on the site.

Paper 2 explicitly assumes Paper 1 content – it is not a fresh start

Paper 2 is built on Sections 6.2, 7 and 8 while assuming knowledge from Sections 1-6.1, meaning Paper 1 content is genuinely examinable background for Paper 2, not separate, unrelated material. Exam-preparation priority: keep Section 1-6.1 content actively revised alongside Paper 2-specific content, rather than treating Paper 1’s material as “done” once that exam has passed – a Paper 2 question can require applying earlier mechanics or electricity concepts without restating them.

Choose and confirm your Paper 3 option topic early

Paper 3’s Section B requires one optional topic chosen from five options (Astrophysics, Medical physics, Engineering physics, Turning points in physics, Electronics), each with its own distinct content. Exam-preparation priority: confirm which option your school teaches well before the exam, and revise only that option in depth – past-paper practice on the wrong option wastes revision time on content you will not be examined on.

Know your equations – some must be recalled, not looked up

As with GCSE, A-Level Physics provides a subset of required equations on a data and formulae sheet, but a further set must be recalled from memory, and many require rearrangement before substitution at this level. Exam-preparation priority: revise which equations are provided versus must be memorised as an explicit checklist, and practise rearranging each recalled equation into different forms before an exam, since A-Level questions more often require algebraic manipulation before substitution than GCSE questions do.

Practical skills and data analysis are compulsory on Paper 3

Section A of Paper 3 (45 of its 80 marks) is compulsory practical skills and data analysis, drawn from across the required practicals regardless of which Section B option is chosen. Exam-preparation priority: revise required-practical methods, uncertainty estimation, and graphical data analysis (gradients, intercepts, error bars) as a heavily weighted, distinct revision strand, since this section applies to every student regardless of their chosen option.

Worked practice scenario: an equation-rearrangement calculation with uncertainty

Question: “A student measures the diameter of a wire as 0.42 mm using a micrometer with a resolution of 0.01 mm. Calculate the percentage uncertainty in the diameter.”

Step 1 - find the absolute uncertainty from the instrument's resolution:
A micrometer gives a measurement (two judgements: the zero and the
reading), so the absolute uncertainty is at least 1 of the smallest
scale reading: +/- 0.01 mm

Step 2 - apply the percentage uncertainty formula:
percentage uncertainty = (absolute uncertainty / measured value) x 100

Step 3 - substitute the values:
percentage uncertainty = (0.01 / 0.42) x 100

Step 4 - calculate and give an appropriate number of significant figures:
percentage uncertainty = 2.38 percent, approximately 2 percent

Every step is shown – identifying the absolute uncertainty from the instrument’s resolution, stating the formula, substituting correctly, and giving an appropriately precise final answer – which is exactly the structure a percentage-uncertainty question rewards at A-Level, where uncertainty calculations are examined explicitly rather than assumed.

Before/during exam checklist

• Before the exam: keep Section 1-6.1 content actively revised alongside Paper 2 preparation; confirm your Paper 3 option topic early and revise only that one in depth; build a checklist of provided versus recalled equations and practise rearranging them; revise uncertainty estimation and graphical data analysis as a heavily weighted Paper 3 strand.
• During Paper 1: content spans Sections 1-5 plus periodic motion – expect some questions to combine ideas across sections.
• During Paper 2: be ready to apply earlier mechanics or electricity concepts (Sections 1-6.1) without them being restated in the question.
• During Paper 3: complete Section A (compulsory practical skills) with the same care as Section B, since it carries more marks (45 vs 35) despite testing content common to every student.
• On every paper: finish every calculation with a unit and an appropriate number of significant figures, and rearrange an equation fully before substituting values.

Self-test

1. Why is Paper 1 content still relevant once you have sat that exam and moved on to Paper 2 revision?
2. Why is confirming your Paper 3 option topic early important?
3. Which section of Paper 3 is compulsory for every student, and how many of its 80 marks does that section carry?
4. In the worked scenario, why is the absolute uncertainty taken as one whole smallest division of the micrometer rather than half of one?

Answers: 1. Because Paper 2 explicitly assumes knowledge from Sections 1-6.1 as background for its own content (Sections 6.2, 7 and 8), so a Paper 2 question can require applying earlier concepts without restating them. 2. Because Paper 3’s Section B requires one optional topic chosen from five distinct options, and past-paper practice on the wrong option wastes revision time on content you will not actually be examined on. 3. Section A, compulsory practical skills and data analysis, carrying 45 of the paper’s 80 marks (more than Section B’s optional-topic 35 marks). 4. Because AQA’s Required practical handbook lists the micrometer as a measurement needing two judgements (setting the zero and taking the reading), each uncertain by half a division, and states that ‘The uncertainty of a measurement (two judgements) is at least ±1 of the smallest scale reading’; half a division applies only to a single reading such as a thermometer.

Written against AQA A-Level Physics 7408 (specification-at-a-glance, verified 2026-08-28). The worked scenario above is an original example written for this resource, not a reproduction of any official past or sample paper question. Always check the current specification for your examination year at aqa.org.uk.