Exam Intelligence · 6 Official Documents Analysed

How to Score Higher in OCR A Level Physics A (H556)

Evidence-based Physics A H556 exam guide built from official OCR examiner reports and mark schemes. Specialised and comprehensive study tips — specific, cited insights so you can achieve top grades.

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Evidence-BasedBuilt from 6 official examiner reports & mark schemes (2023–2024)

What Are Assessment Objectives (AOs)?

Before we dive in, you need to understand how OCR actually marks your answers.

AO stands for Assessment Objective. Think of AOs as the different “skills” OCR tests you on in every single question. When an examiner marks your paper, they don't just give you a mark out of 12 based on how “good” your answer feels — they allocate specific marks to each AO separately.

For example, a 12-mark question might be split as: AO1 (2 marks) + AO2 (2 marks) + AO3 (2 marks) + AO4 (6 marks). If you write a perfect textbook answer but don't evaluate, you can only score 6 out of 12 — because the other 6 marks are specifically reserved for evaluation.

This is why understanding AOs matters: they tell you exactly what the examiner is looking for and how many marks each skill is worth. Here are the 3 AOs for this subject:

AO1

Knowledge and Understanding

~32%

Recall of physics facts, definitions, equations, units and standard procedures. Examiners consistently note that candidates must use precise technical language — terms such as 'resultant force', 'rate of change of momentum' and 'acoustic impedance' are required; vague everyday phrasings such as 'some of the vehicle's gravity helped' score zero even when the underlying physics instinct is correct.

AO2

Applying Concepts and Principles

~42%

Apply equations to familiar and unfamiliar contexts, perform single and multi-step calculations, interpret graphs and data. The Data, Formulae and Relationships booklet is available in every paper — examiners expect candidates to use it wisely. Show every step in calculations; writing intermediate values and units earns compensatory method marks if the final answer is wrong.

AO3

Analyse, Interpret and Evaluate

~26%

Analyse experimental evidence, evaluate methods and conclusions, apply physics in novel contexts. H556/03 is heavily AO3-weighted — synoptic questions often combine two or three topics (e.g. oscillations + electromagnetism + materials in a single question). Examiners explicitly reward candidates who are 'confident in using their knowledge in unfamiliar contexts' rather than recycling memorised answers.

The key takeaway: Most students lose marks not because they lack knowledge (AO1), but because they skip the higher-order skills — building chains of reasoning (AO2) and making supported judgements (AO3). Everything below shows you exactly how to hit each AO based on what OCR examiners have written in their reports.

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Top Mistakes in A Level Physics A H556

The most common reasons students lose marks in A Level Physics A H556, cited directly from official OCR examiner reports across multiple sessions.

'Show that' questions — omitting the rearrangement step or failing to evaluate to one more significant figure than the printed answer

Flagged in every H556/01 and H556/03 report for both 2023 and 2024; described as 'consistent throughout the paper' · Affects: H556/01, H556/03

What examiners say

“Many candidates omitted the rearrangement stage, restricting their maximum score for this item to 1 mark. This approach was consistent throughout the paper for this type of question.”
— OCR H556/01 June 2024, Question 16 (a) (iii)

“Good practice for "show that" questions is to calculate the quantity required to at least one more significant figure in the question. In this example, that would mean evaluating the density to 1.19 kg m–3.”
— OCR H556/01 June 2023, Question 20 (b)

How to fix this

For every 'show that': write the symbolic equation first, rearrange to make the target quantity the subject (this earns a method mark), substitute numbers with units, evaluate to one more sf than the printed result, then state the final value. Never skip the rearrangement even if it seems obvious — examiners penalise its absence.

Level of Response questions answered in full for one part only — the second required section is left blank or treated as optional

Cited in the series overview of H556/02 2023 and H556/02 2024; examiners describe it as a persistent pattern among otherwise strong candidates · Affects: H556/01, H556/02, H556/03

What examiners say

“Many strong candidates only answered one part of the question; this highlights the need to read it carefully – there will nearly always be two parts.”
— OCR H556/02 June 2023, Question 17 (b)

“answered only one section of the two required in one or more of the LoR questions.”
— OCR H556/02 June 2023, Paper 2 Series Overview

How to fix this

Before answering any LoR question, underline the two separate demands (e.g. 'describe the experiment AND calculate the half-life'). Write a two-part plan: one paragraph per part. Split your time evenly — a Level 3 mark requires both sections to be adequately addressed, not one section in depth and one line for the other.

Using imprecise or GCSE-level language instead of A-Level technical terminology in explanations

Flagged in the series overview of H556/01 2023 and 2024; specifically cited in Q16(b)(ii) 2023 and Q17(a) 2024 · Affects: H556/01, H556/02

What examiners say

“Useful phrases for explanations on this idea were 'resultant force' and 'component of weight parallel to the slope' rather than 'extra force' or 'some of the vehicle's gravity helped'.”
— OCR H556/01 June 2023, Question 16 (b) (ii)

“responses that included ideas of 'less air to push' or 'less mass moved per second' are insufficient at A2 Level.”
— OCR H556/01 June 2023, Question 20 (d)

How to fix this

Build a vocabulary list of A-Level physics terms for each topic. For mechanics: 'resultant force', 'rate of change of momentum', 'component of weight'. For waves: 'acoustic impedance', 'path difference', 'coherent'. For fields: 'flux linkage', 'induced emf'. Before writing, identify the specific technical phrase the mark scheme is likely to target, then use it explicitly.

Using F = ma as the statement of Newton's second law — penalised as a special case, not the general law

Cited in H556/01 2023 Q20(c) and H556/01 2024 Q17(a) as 'wrong physics' even when the numerical answer is coincidentally correct · Affects: H556/01, H556/03

What examiners say

“We rejected the use of the idea F=ma as it is wrong physics, even though the numerical value is the same.”
— OCR H556/01 June 2023, Question 20 (c)

“Common misconception that F = ma is Newton's second law, whereas it's a special case.”
— OCR H556/01 June 2024, Question 17 (a)

How to fix this

State Newton's second law as 'the resultant force equals the rate of change of momentum: F = dp/dt'. F = ma is only valid when mass is constant — acceptable for most A-Level problems, but whenever a question asks you to 'state' Newton's second law or uses variable mass (jets, rockets, gas molecules), write the rate-of-change-of-momentum form.

Power-of-ten errors from unit prefixes — especially milliseconds, millimetres, kV, mm² and unit-prefix confusion in logarithm questions

Cited across all six reports; described as the main source of lost marks in otherwise correct calculations in H556/02 2023 and H556/03 2023/2024 · Affects: H556/01, H556/02, H556/03

What examiners say

“candidates that forget that the time was measured in milliseconds picked answer D rather than the correct answer, B.”
— OCR H556/01 June 2023, Question 6

“did not have a good knowledge of unit prefixes and so produced power of ten (PoT) errors”
— OCR H556/02 June 2023, Paper 2 Series Overview

How to fix this

Write every unit conversion as a separate algebraic line before substituting: ms → s (÷ 10³), mm → m (÷ 10³), mm² → m² (÷ 10⁶), kV → V (× 10³), MeV → J (× 1.6 × 10⁻¹³). Check axis prefixes on graphs before reading off values. A 1% time investment in conversions prevents a disproportionate loss of final-answer marks.

Confusing percentage uncertainty with percentage difference — treating the discrepancy from the accepted value as an uncertainty estimate

Cited as a 'Misconception' in H556/01 2023 Q18; a recurring data-analysis error in investigative questions · Affects: H556/01, H556/03

What examiners say

“Candidates in this paper mistook the percentage difference for the percentage uncertainty in this question.”
— OCR H556/01 June 2023, Question 18

How to fix this

Memorise the distinction: percentage uncertainty = (absolute uncertainty / measured value) × 100 — it comes from instrumental resolution or range of repeated readings. Percentage difference = |experimental − accepted| / accepted × 100 — it requires two values, one of which is the 'true' or textbook value. Never substitute one for the other in a data-analysis question.

Capacitor energy change calculated using difference in voltages rather than difference of squared voltages

Cited in H556/02 2023 Q20(e)(ii) as the main error; only around one third of candidates gained full marks · Affects: H556/02

What examiners say

“the most common error was to calculate the change in energy using the difference in voltages (using 1.88 V) rather than calculating the separate energies and then subtracting.”
— OCR H556/02 June 2023, Question 20 (e) (ii)

How to fix this

Energy stored: E = ½CV². Change in energy = ½CV₂² − ½CV₁². Never write ½C(V₂ − V₁)² — this is mathematically different. Calculate E₁ and E₂ separately on two lines, then subtract. The same principle applies to kinetic energy changes: ΔKE = ½mv₂² − ½mv₁², not ½m(v₂ − v₁)².

Applying physics laws in general rather than to the specific bodies and context in the question — Faraday's law, Newton's third law and other principles stated without link to the scenario

Noted in H556/03 2024 Q4(c)(i) and H556/03 2024 series overview; recurs across LoR questions in both years · Affects: H556/02, H556/03

What examiners say

“Candidates should be encouraged to write in less general terms and to focus their answer on the specific question.”
— OCR H556/03 June 2024, Question 4 (c) (i)

“re-used answers from previous mark schemes without thinking about how to apply them to an unfamiliar question or context.”
— OCR H556/01 June 2023, Paper 1 Series Overview

How to fix this

After stating any law, add one sentence that names the specific objects in the question and applies the law to them: 'By Faraday's law, as magnet L oscillates, the rate of change of flux linkage in coil Y changes, inducing an alternating emf.' Template: [law statement] + [which specific object/coil/particle is involved] + [what physically happens as a result].

Apply what you've learned

Practice identifying these mistakes in real papers. Try a recent paper and mark yourself — you'll spot these patterns immediately.

Try June 2025 All H556 Papers

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What A Level Physics A H556 Examiners Reward

Patterns that consistently earn high marks in A Level Physics A H556, based on OCR examiner report commentary on top-scoring answers.

Show working in multi-step calculations so compensatory method marks are available

Examiners explicitly note that 'incorrect answers with no working will gain no marks' and that showing intermediate steps earns C marks even when the final answer is wrong. Applied consistently across all three papers.

Source: OCR H556/02 June 2023, Q16 (d) — 'an incorrect response of 3.7° could gain 2 marks as it was very evident where it came from.'

Use the Data, Formulae and Relationships booklet actively — look up constants and unfamiliar formulae mid-exam

Both the 2023 and 2024 H556/01 series overviews explicitly distinguish candidates who 'used the data and relationships book wisely' from those who 'used it sparingly if at all', treating this as a key differentiator for the top marks.

Source: OCR H556/01 June 2023, Paper 1 Series Overview — 'used the data and relationships book wisely'

In practical and planning questions, specify the graph to be plotted, what the gradient represents, and how the target quantity is extracted

H556/01 2023 and 2024 LoR exemplar commentary notes that Level 3 responses describe 'which variable should be plotted on which axis and how a value of g could be obtained from such a graph'. A statement of 'measure v several times and take an average' without specifying the graph scores Level 1 at best.

Source: OCR H556/01 June 2023, Question 18 — 'there is a full description of the required graphical analysis, justifying which variable should be plotted on which axis'

Draw labelled force/ray/circuit diagrams in pencil and use a ruler for straight lines and field lines

H556/02 2023 and 2024 examiners note marks lost through freehand curves, unequal field-line spacing and unclear circuit symbols. Diagrams drawn in pencil are easily corrected; those drawn in pen 'make it difficult to award a mark'.

Source: OCR H556/02 June 2024, Q22 (a) (i) — 'Exemplar 3 only scored the second mark, as the spacing is unequal ... far better for the candidate to use a ruler'

When answering resonance, oscillation or wave-superposition questions, link to the specific frequency and amplitude behaviour described in the question

H556/03 2024 Q4(c)(ii) showed that many candidates did not realise the question was about resonance because of the unfamiliar context. Those who spotted the resonance link, marked the natural frequency and described both amplitude and frequency variation gained Level 3.

Source: OCR H556/03 June 2024, Q4 (c) (ii) — 'Many candidates did not realise that this was a question about resonance, presumably because of the unfamiliar context of the question.'

Answer every aspect of a Level of Response question — structure the response as explicitly two or three bullet-point sections matching the question's demands

H556/02 2023 and H556/03 2024 both show exemplars where full marks required the description AND the calculation sections to be complete. Examiners award Level 3 holistically — a perfect calculation with no description is capped at Level 2.

Source: OCR H556/03 June 2024, Q3 *(b) — 'Level 3 candidates set out a correct calculation of H, together with the assumptions required at each stage, plus an evaluation of the assumption'

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A Level Physics A H556 Answer Frameworks

Structured approaches for each A Level Physics A H556 question type, derived from OCR mark scheme requirements.

Multi-step calculation with unit conversions

3–5 minutes per 3-mark calculation

Structure

Write equation in symbols → write each unit conversion as a separate line → substitute numbers with units → evaluate carrying 4+ sf → round final answer to 3 sf or match given data → state unit

•Write the symbolic equation first — it earns a method mark even if the arithmetic later fails
•Convert every prefix (ms, mm, kV, MeV) to SI on its own line before substituting
•Keep 4+ sf through intermediate steps; round only at the very end
•Always include the unit on the final answer — examiners deduct for missing units

'Show that' derivation

2–3 minutes

Structure

Write the standard equation → rearrange to make the target quantity the subject → substitute given values with units → evaluate to one more sf than the printed result → state final value

•The rearrangement step earns its own mark — never skip it even if it seems trivial
•Compute to a sharper precision than the printed answer (e.g. printed '9.8', calculate '9.81')
•Do not reverse-engineer from the printed result — examiners spot fudged intermediates
•State the formula by name or symbol (e.g. 'using pV = nRT') to make the starting point unambiguous

Level of Response practical planning or evaluation

8–10 minutes for a 6-mark LoR

Structure

Underline both required sections → section 1: name instruments + describe procedure + identify controlled variables → section 2: state the graph (axes, what is plotted), gradient meaning, how target quantity is extracted → conclude with a specific quantitative evaluation

•Use bullet points with one physics idea per bullet — examiners award holistically but need to see distinct points
•Always describe the graphical analysis: name x-axis, y-axis, state what the gradient equals and what you do with it
•To reach Level 3 in evaluation questions, calculate numerical uncertainties and compare them, not just 'describe' which method is better
•Check that you have addressed both parts — descriptions alone or calculations alone are capped at Level 2

Synoptic analysis (H556/03 multi-topic questions)

5–8 minutes per structured part

Structure

Identify all topics involved → apply principle from topic 1 to find intermediate result → apply principle from topic 2 using that result → link to the specific context or diagram given → state the physics conclusion clearly

•Do not recycle a memorised answer from a previous paper — synoptic questions test unfamiliar contexts deliberately
•Name each intermediate quantity and its equation so the examiner can follow the chain of reasoning
•If the question involves a graph, read axis values with their prefixes before substituting
•For resonance/oscillation questions: check whether you are dealing with forced or free oscillations before applying formulae

Graphical analysis (gradient, best-fit line, area under curve)

4–6 minutes

Structure

Plot points carefully as crosses with a sharp pencil → draw best-fit line (equal scatter either side, not dot-to-dot) → choose two points on the LINE (not in the table) to calculate gradient → read axis prefixes → state the physical quantity the gradient represents

•Use a 30 cm ruler for best-fit straight lines — a short ruler produces a line that cannot span the full graph
•The gradient triangle should span at least half the line to minimise reading errors
•Never take points from the data table for a gradient calculation — use points that sit on your best-fit line
•For area-under-curve: count grid squares for curved data rather than fitting geometric shapes (examiners confirm this as more reliable)

Practice by topic

Use topical past papers to practice specific question types. Each topic collects questions from multiple years — perfect for drilling the frameworks above.

Topical Past Papers

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A Level Physics A H556 Command Words Decoded

Each command word in A Level Physics A H556 is a scoring instruction. Understanding what OCR examiners expect is critical to earning full marks.

state1 mark

Give a brief factual answer with no working — a value, definition or one-line statement. Precision matters: 'coherent waves have a constant phase difference' not 'waves that are the same'.

Common mistake

Vague everyday language instead of the specific A-Level term the examiner is targeting. Repeating the wording of the question without adding the required physics concept.

calculate2–4 marks

Find a numerical value. Show the equation in symbols, show unit conversions as separate lines, substitute with units, evaluate to at least 2–3 sf, state unit on the final answer.

Common mistake

Omitting unit conversions (especially ms, mm, kV); rounding intermediate answers; writing only the final number with no working — which prevents compensatory method marks.

show that2–3 marks

Derive or arrive at a printed result. Every step — standard equation, rearrangement to make target the subject, substitution with units, evaluation — must be explicit. Evaluate to one more sf than the printed answer to prove you reached it honestly.

Common mistake

Omitting the rearrangement step (costs 1 mark); evaluating to exactly the printed number of sf rather than one more; working backwards from the answer.

explain2–4 marks

Give a physics reason linking cause to effect, applied to the specific situation. Name the objects in the question, state the relevant law or principle, and describe the mechanism.

Common mistake

Stating a law in general form without applying it to the specific bodies (e.g. 'Faraday's law says an emf is induced' without saying which coil or what is changing).

describe2–6 marks in LoR questions

Give a sequential account of what happens. For practical questions: name the instruments, state what measurements are taken and how, specify what graph is plotted and how the target quantity is extracted.

Common mistake

Giving only a qualitative overview without naming instruments or specifying the graphical analysis; answering only one of two required sections in a LoR question.

deduce2–3 marks

Use given data plus a physics principle to reach a logical conclusion. State the principle, apply it to the numbers or graph, and state the conclusion explicitly.

Common mistake

Stating the conclusion without the physics justification; using a general principle without showing the numerical link to the specific data provided.

evaluate4–6 marks in LoR questions

Assess strengths, limitations and/or make a comparative judgement. For experimental evaluations in H556/03: calculate percentage uncertainties, compare the two or more methods quantitatively, and reach a specific conclusion. A purely qualitative evaluation is capped at Level 1.

Common mistake

A solely qualitative evaluation when the question provides numerical data for comparison; not performing the supporting calculations; reaching a vague 'it depends' conclusion without specifying on what.

determine2–4 marks

Find a value, often by extracting data from a graph, table or diagram. Show the route from the data to the result — particularly important for gradient calculations, which must use points on the line of best fit, not data from the table.

Common mistake

Taking gradient from tabulated data points rather than from points on the best-fit line; using a gradient triangle that spans less than half the line; misreading axis prefixes.

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A Level Physics A H556 Diagram Checklist

Incorrect diagrams in A Level Physics A H556 are flagged in every OCR examiner report. Use this checklist before every practice and in the exam.

Force diagram on an object in circular motion or equilibrium

Show every force acting ON the body: weight mg vertically downwards through the centre of mass; normal contact force perpendicular to the surface; tension along the string towards the pivot; any applied force with its labelled direction. For circular motion, identify the centripetal (resultant) force — do not add a fictitious centrifugal force. Label magnitudes and indicate components explicitly.

Common error: Omitting the weight of the beam or rod itself; forgetting to take moments about the correct pivot; treating the centripetal force as a separate additional force rather than the resultant of existing forces. Examiners note that candidates often omit the weight of a structural member and hence get wrong moments.

Electric or magnetic field lines between plates or around a point charge

Uniform field between parallel plates: straight, parallel, evenly spaced vertical lines drawn with a ruler — unequal spacing loses the mark. Arrows indicate direction from positive to negative plate. For point or spherical sources: radial lines whose density represents field strength; equipotentials are concentric circles perpendicular to field lines.

Common error: Unequal spacing between field lines in a uniform-field question (cited in H556/02 2024 Q22); lines not drawn with a ruler; arrows omitted or pointing the wrong direction. Using the formula for charge on a sphere instead of the correct formula for a parallel-plate capacitor.

Ray diagram for refraction, total internal reflection or diffraction through a slit/grating

Draw the normal at every boundary as a dashed line; measure all angles from the normal, never from the surface. For the Doppler and diffraction questions in H556/02: identify path difference in terms of wavelength. For the de Broglie electron-diffraction experiment: electrons accelerated through a potential, pass through a graphite target, and form concentric ring patterns — not a ripple-tank setup.

Common error: Given angle in glass is not measured relative to the normal — a common distractor in MCQ (H556/02 2023 Q11). Describing the electron-diffraction apparatus as a ripple tank or assuming graphite produces the electrons. Using the speed of light for the de Broglie electron velocity — explicitly marked as wrong physics.

Circuit diagram with capacitor charging/discharging, including switch configuration

Draw supply, capacitor and resistor in series with a voltmeter in parallel with the capacitor. Include a switch arrangement that allows separate charge and discharge paths. Use standard symbols; do not use 'C in a circle' for the capacitor. On V-t graphs: exponential decay for discharge, exponential approach for charging. On log-linear graphs: straight line of gradient −1/RC.

Common error: Drawing a single switch in series that blocks either charging or discharging; not knowing the standard capacitor symbol; calculating energy change as ½C(V₂−V₁)² instead of ½CV₂²−½CV₁² (cited in H556/02 2023 Q20(e)(ii)); confusing the charging and discharging equations.

SHM displacement-time and acceleration-displacement graphs

Axes: displacement x / m (for a-x) or time t / s (for x-t) × acceleration a / m s⁻² (for a-x) or displacement x / m (for x-t)

x-t: sinusoidal between +A and −A with period T. a-x: straight line through the origin with negative gradient (a = −ω²x). Mark the amplitude A and the isochronous period (T independent of A). SHM is isochronous — link 'initial displacement' to 'amplitude', not to 'maximum speed' directly.

Common error: Drawing a positive gradient on a-x graph; confusing amplitude with total distance travelled per oscillation; not recognising that period is independent of amplitude (isochronous property); failing to link initial displacement to amplitude in the SHM context — examiners note candidates who merely repeat 'initial displacement' instead of using the term 'amplitude' score zero (H556/01 2023 Q21(a)(iii)).

H-R diagram with stellar evolution track

Axes: Surface temperature / K (decreasing right to left) or spectral class × Luminosity / L☉ or absolute magnitude

Main sequence: diagonal band from hot-bright (top left) to cool-dim (bottom right). Mark red giant/red supergiant region (top right), white dwarf region (bottom left). Draw the evolutionary track: main sequence → red giant → (for sun-like) white dwarf; or main sequence → red supergiant → neutron star/black hole for M > 10 M☉. Use Wien's law to relate λ_max to surface temperature.

Common error: Confusing the original supergiant star mass with the remnant core mass — the core must exceed the Chandrasekhar limit (1.4 M☉), not the whole star; calling it a 'super red giant' rather than 'red supergiant'; omitting luminosity from the H-R axes so the track cannot be verified; concluding that surface temperature alone uniquely identifies a star's position (it does not — luminosity is also needed).

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Topics Students Struggle With Most In A Level Physics A H556

These A Level Physics A H556 topics consistently produce the lowest scores. Prioritise these in your revision.

SHM: linking initial displacement to amplitude, and applying the isochronous property

H556/01 2023 Q21(a)(iii): 'A reasonably large proportion of candidates did not link the idea of initial displacement to the amplitude of this motion.' The isochronous property — that period is independent of amplitude — was often recalled but rarely applied to justify why the period stays constant when amplitude changes.

Affects: H556/01

Practical investigations: describing graphical analysis, gradient meaning and error propagation

H556/01 2023 Q18 (Level 3 response criteria): 'There is no reference to graphical analysis at all. This resulted in this response being marked as a Level 1 response.' Examiners note that candidates often calculate g from single data points rather than describing the required graph and propagating uncertainties through it.

Affects: H556/01, H556/03

Coherence and path/phase difference in wave superposition

H556/02 2023 Q16(b): 'While many candidates had an appreciation that it was related to phase, there were many responses that it was when two waves were in phase.' Around half of candidates could correctly explain coherence. Candidates also confused path difference (in wavelengths or metres) with phase difference (in radians or degrees).

Affects: H556/02

Acoustic impedance and its role in ultrasound reflection at boundaries

H556/02 2023 Q17(c)(ii): 'Only around 40% used the term [acoustic impedance] correctly and only half of this appreciated that this was the difference between B and C and their surrounding mediums rather than simply the difference between B and C.' The attenuation coefficient was frequently substituted for acoustic impedance.

Affects: H556/02

Nuclear binding energy per nucleon — fusion releases energy because binding energy per nucleon increases

H556/02 2024 Q20(c)(i): 'few candidates appreciating the idea that an increase in binding energy per nucleon would result in energy given out. Many candidates simply restated the question, by saying low mass would join to give higher mass or stated that iron was the most stable isotope.'

Affects: H556/02

Stellar physics: Chandrasekhar limit applies to the remnant core, not the whole original star; Wien's law and H-R diagram limitations

H556/03 2023 Q3(a)(i): candidates 'have not been sufficiently distinguished' between original star and remnant core. H556/01 2024 Q21(c) found that 'the range of luminosities was about 10' on a logarithmic scale — candidates who noticed this quantitative aspect reached higher marks than those who gave qualitative descriptions only.

Affects: H556/01, H556/03

Resistivity versus resistance — misreading a familiar-looking problem that actually asks for an invariant quantity

H556/02 2023 Q8: 'Only a little over one quarter of the candidates appreciated this; by far the majority calculated the ratio of resistances.' The question asked about resistivity (which is constant for the same material regardless of wire dimensions) — candidates assumed it was the same question type as a resistance-ratio problem.

Affects: H556/02

Resonance in unfamiliar physical systems — recognising forced oscillation and describing frequency-amplitude behaviour quantitatively

H556/03 2024 Q4(c)(ii): 'Many candidates did not realise that this was a question about resonance, presumably because of the unfamiliar context.' Common errors: not labelling scales on the amplitude-frequency graph; not marking the resonance frequency numerically; only describing amplitude change without describing how frequency varied.

Affects: H556/03

Target your weak areas

The topics above are where most marks are lost. Use past papers and mark schemes to practice these specific areas until they become second nature.

Past Papers & Mark Schemes Topical Papers

Frequently Asked Questions

How is OCR A-Level Physics A H556 structured across the three papers?

H556 comprises three written papers plus the Practical Endorsement. H556/01 (Modelling Physics, 37%, 100 marks, 2h 15m) covers mechanics, materials, thermal physics, SHM and astrophysics. H556/02 (Exploring Physics, 37%, 100 marks, 2h 15m) covers electric/magnetic fields, circular motion, particle physics and medical imaging. H556/03 (Unified Physics, 26%, 70 marks, 1h 30m) is a synoptic paper drawing on the full specification. In addition, the Practical Endorsement (reported as pass/fail on the certificate) does not contribute to the A-Level grade but requires completion of the required PAG activities.

Is a formula sheet provided in the OCR A-Level Physics A exam?

Yes — OCR provides the Data, Formulae and Relationships booklet in every H556 paper. It contains physical constants, standard equations and mathematical relationships. Examiners explicitly note in both 2023 and 2024 that high-scoring candidates 'use the data and relationships book wisely' while lower-scoring candidates 'use it sparingly if at all.' You still need to memorise definitions, units and some core equations (e.g. F = qvB, E = hf) that are not in the booklet.

Does the Practical Endorsement affect my A-Level grade?

No — the Practical Endorsement is assessed separately and reported as a pass/fail on your certificate alongside the A-Level grade. It does not count towards the letter grade (A*, A, B, etc.). However, universities may specify that you need a pass in the endorsement for science degree entry. The practical skills assessed in the PAGs are also examined through AO3 questions in the written papers, particularly in H556/01 and H556/03.

What is the difference between OCR A-Level Physics A H556 and AS Physics H156?

H156 is the standalone AS-Level qualification (two papers, H156/01 and H156/02, assessed after one year of study). H556 is the full two-year linear A-Level with three papers. The two qualifications are entirely separate — AS results do not contribute to the A-Level grade. H556/03 (Unified Physics) and the full depth of topics in modules 4 and 6 only appear in the A-Level. When searching for past papers and examiner reports, use H556 codes for A-Level and H156 codes for AS — they are different assessments.

How does OCR A-Level Physics A H556 compare to AQA Physics and Edexcel Physics?

All three are linear A-Level qualifications with similar AO weightings (AO1 ~30%, AO2 ~40%, AO3 ~30%). OCR H556 is distinctive for its synoptic H556/03 paper, which explicitly combines multiple topics within a single question and rewards candidates who apply knowledge in genuinely unfamiliar contexts. AQA 7408 uses a separate optional-topic paper (Paper 3) and Edexcel 9PH0 includes a core practical paper. OCR's Level of Response questions appear in all three papers and require both a descriptive and a quantitative section — a format less prominent in AQA and Edexcel. For practicals, OCR's PAG structure is broadly equivalent to AQA's and Edexcel's required practicals.

What topics span multiple H556 papers, and how should I prepare for synoptic questions in H556/03?

Module 1 (practical skills) and Module 2 (foundations) underpin all three papers. H556/03 explicitly draws on all six modules simultaneously — a 2024 question combined Forces in Action (module 3.2), Materials (3.4), Oscillations (5.3) and Electromagnetism (6.3) in a single question sequence. To prepare: after revising each topic individually, practise identifying which laws from other topics can be applied in a given context. Examiners reward candidates who 'apply their knowledge in unfamiliar contexts' — the best preparation is working through H556/03 papers and annotating which module each sub-question draws from.

Put It All Into Practice

You now know exactly what OCR examiners reward and penalise. The next step is deliberate practice with real papers. We have 13 exam sessions available for A Level Physics A H556 — question papers, mark schemes, and examiner reports.

View All Past Papers Latest Session: June 2025 Topical Past Papers