OCR A-Level Physics revision: H556 modules, papers and the plan
OCR A-Level Physics A (H556) is taught as six modules and examined in three papers: Paper 1 'Modelling physics' (2h15, 100 marks) covers modules 1, 2, 3 and 5, Paper 2 'Exploring physics' (2h15, 100 marks) covers modules 1, 2, 4 and 6, and Paper 3 'Unified physics' (1h30, 70 marks) is synoptic across everything. Revision should secure modules 1 and 2 first — they are on both content papers — then train the connections for the synoptic paper.
OCR physics splits its content papers by theme rather than by topic list — 'Modelling' and 'Exploring' — which confuses students until they realise it is just the usual split: mechanics-and-fields on one side, electrons-waves-photons and particles on the other. The structure is tidy once you see it.
The specification, in plain English
| Module | Content | Where it's examined |
|---|---|---|
| 1. Practical skills | Planning, implementing, analysis, evaluation | All papers |
| 2. Foundations | Quantities, units, vectors, motion basics | Papers 1 & 2 |
| 3. Forces & motion | Dynamics, energy, momentum, materials | Paper 1 |
| 4. Electrons, waves & photons | Circuits, waves, quantum phenomena | Paper 2 |
| 5. Newtonian world & astrophysics | Circular motion, SHM, thermal, fields, cosmology | Paper 1 |
| 6. Particles & medical physics | Capacitors, fields, nuclear, medical imaging | Paper 2 |
| Paper | Modules | Time | Marks | Weight |
|---|---|---|---|---|
| Paper 1 — Modelling physics | 1, 2, 3, 5 | 2h 15m | 100 | 37% |
| Paper 2 — Exploring physics | 1, 2, 4, 6 | 2h 15m | 100 | 37% |
| Paper 3 — Unified physics | All, synoptic | 1h 30m | 70 | 26% |
The Unified paper
Paper 3 is 70 marks in 90 minutes covering the whole course synoptically — a question can open in astrophysics and close in capacitors. It rewards the students who revised the connections, not just the content. The preparation is deliberately practising cross-module questions, not more single-topic drilling.
Worked questions in the OCR style
An object oscillates with a = −ω²x, where ω = 5 rad s⁻¹. Find the maximum acceleration at amplitude 0.04 m.
- Maximum acceleration is at maximum displacement: a_max = ω²A.
- a_max = 25 × 0.04 = 1.0 m s⁻².
- It occurs at the extremes of the motion — where displacement is greatest.
- The defining equation a = −ω²x is the whole of SHM — most questions reduce to it.
a_max = 1.0 m s⁻² at the extremes. ω²A is the only formula the question needs.
Explain how the same capacitor equations describe both energy storage in a defibrillator and signal timing in a medical sensor.
- The synoptic move: one piece of physics (E = ½CV², exponential discharge) applied in two contexts.
- Defibrillator: the capacitor stores E = ½CV² and releases it fast — the same equation, high energy.
- Sensor: the RC time constant τ = RC controls response time — the same exponential, used for timing.
- The marks are for recognising the shared physics — the contexts are different, the equations are not.
- Paper 3's signature: it rewards seeing the same physics in different clothes.
Same physics (E = ½CV², exponential discharge), different application. Paper 3 wants the connection named.
Common OCR mistakes
- Treating Modules 1 and 2 as done — they are on both content papers and carry heavy weight.
- Revising modules in isolation — Paper 3 specifically rewards connections.
- Deriving equations from memory instead of from the principle — 'show that' wants the reasoning.
- Explanation answers with equations only — the mechanism in words is the mark.
- Leaving Paper 3 revision last — synoptic skill takes the longest to build.
Your OCR checklist
- I have revised each module and know which paper covers it.
- Modules 1 and 2 are secured first — they are on both content papers.
- I have done at least two Unified papers and can answer cross-module questions.
- I can derive the key equations from the physical principle.
- I can explain a process in words — mechanism, cause, effect.
- I have done timed sections for all three papers including the 1h30 Paper 3.
The Unified paper tests connections the module structure hides — and those have to exist before the exam asks. If your modules still feel like separate subjects, ask Lumi to question you across them: 'how does what you know about SHM connect to circular motion?' That is the paper's real demand.
What to take from this
- Paper 1 = modules 1, 2, 3, 5; Paper 2 = modules 1, 2, 4, 6; Paper 3 = synoptic.
- Module 1 (practical skills) and Module 2 (foundations) are on both content papers.
- The Unified paper is short (70 marks, 1h30) and rewards cross-module connections.
- OCR mark schemes want derivations shown and explanations in words.
- At least 40% of marks are maths across the papers.
Questions people also ask
Paper 3 — a 70-mark, 90-minute synoptic paper covering the whole course. Questions deliberately cross module boundaries and reward connecting ideas over single-topic depth.
Just the content split: Paper 1 (Modelling) covers modules 1, 2, 3 and 5 — mechanics, materials, SHM, fields, astrophysics. Paper 2 (Exploring) covers modules 1, 2, 4 and 6 — electrons, waves, photons, capacitors, nuclear, medical.
Modules 1 (practical skills) and 2 (foundations) — examined on both content papers, so they carry more weight than any single content module.
No — there is a practical endorsement, a separate pass/fail on lab skills. Module 1's practical content is examined on the written papers as method and analysis questions.