Physics rewards a specific combination of conceptual clarity, formula fluency and exam-mark-scheme literacy. Here is exactly what an A* student does differently.
Velocity Tuition Academy · Physics · A* Strategy
Updated May 2026·Written by Velocity Tuition Academy·Reviewed by experienced Cambridge CAIE and Edexcel Physics tutors
An A* in Physics — at IGCSE or A-Level — is one of the strongest subject signals for engineering, medicine, physical sciences and any quantitative degree. It is also one of the most consistently mis-prepared subjects: students focus on memorising content, then lose marks in the exam to weak problem-solving structure and missed mark-scheme keywords. This guide explains exactly where the A* is won and lost across Cambridge IGCSE 0625, Edexcel IGCSE 4PH1, Cambridge A-Level 9702, and Edexcel International A-Level Physics.
Physics Is A Problem-Solving Subject, Not A Content-Memory Subject
The single most important shift for students aiming at A*: Physics rewards problem-solving structure more than content recall. A student who memorises every definition but cannot decompose a multi-step problem will score 7 or 8 on Edexcel 9-1. A student with solid (not encyclopaedic) content knowledge who decomposes problems systematically will score 8 or 9.
The problem-solving habit that A* students develop:
Identify what the question is asking for in physical terms — force, energy, current, momentum, intensity?
Write the relevant equation on the page before substituting values.
Substitute, with units. Strip units in the final answer only.
Sanity-check the magnitude — is the answer's order of magnitude consistent with everyday physics?
Master The Equation Sheet (And What's Not On It)
Both Cambridge and Edexcel provide formula sheets in Physics exams — but neither sheet is exhaustive. Students need to know:
Which formulae are given (so they don't waste revision time memorising them).
Which formulae are NOT given — these are the ones to drill until automatic. At IGCSE these typically include things like v = u + at, F = ma, P = IV, density ρ = m/V, and a few others depending on the board.
How to rearrange formulae quickly. The exam asks for a final answer; many problems require rearranging before substituting.
At A-Level, the equation sheet is more generous but the problems require combining multiple equations. A* students often work through a Pure-style chain: identify equation 1, substitute into equation 2, then evaluate.
Diagrams and Free-Body Sketches Win Marks
Mechanics and electromagnetism questions reward diagrams. A clearly drawn free-body diagram, labelled circuit diagram, or ray diagram earns method marks even when the final number is wrong. The diagram conventions to drill:
Free-body diagrams — show the object as a dot or simple shape; arrows for every force, originating from the object; label each force (weight W or mg, normal N, friction F, applied Fa, tension T).
Circuit diagrams — use standard symbols, label components with values, mark current direction (conventional or electron).
Ray diagrams for lenses and mirrors — three principal rays from one point; label the image (real/virtual, upright/inverted, magnified/diminished).
Wave diagrams — label wavelength, amplitude, period, and any phase relationships.
The mark scheme awards specifically for diagram labels. A student who draws a beautifully neat unlabelled diagram earns less than one who draws a rough but fully-labelled one.
Definitions and Key Vocabulary
Physics mark schemes are unusually strict on definitions. "Define momentum" requires momentum is the product of mass and velocity, not "how much something is moving." Lose 1 mark for the imprecise version. A* students learn the precise wording for:
Newton's three laws (often required verbatim)
Energy types (kinetic, gravitational potential, elastic potential, thermal, internal)
Electrical quantities (current, voltage, resistance, power, EMF — particularly the distinction between EMF and terminal pd)
Modern physics (at A-Level): photon energy, wave-particle duality, threshold frequency, decay law
Practical Skills Assessment
Both Cambridge and Edexcel assess practical skills — Cambridge via Paper 5 (Practical Test) or Paper 6 (Alternative to Practical); Edexcel via Paper 2 questions on apparatus, results tables and uncertainty.
A* candidates internalise the practical-skills checklist:
Variables — identify the independent, dependent, and controlled variables.
Apparatus selection — choose for precision (e.g., micrometer for small lengths, not ruler).
Results tables — column headings include the quantity AND units in square brackets, e.g., Length [m].
Graphs — sensible scale (axes not clipped), points plotted as crosses, line of best fit drawn through, NOT joining the dots.
Uncertainty — quote the absolute uncertainty in measurements; the final calculated quantity's uncertainty is the sum of fractional uncertainties.
A-Level Specifically: Calculus and Capacitors
At A-Level the conceptual demand jumps. The two areas where A-Level Physics students most often lose marks:
Calculus in physics contexts — recognising that v = ds/dt and a = dv/dt means questions can be answered by differentiation, not just kinematic substitution. Similarly, area under a graph is often the answer (impulse from F-t graph, work from F-s graph).
Capacitor charging and discharging — exponential decay, time constant τ = RC, energy stored ½CV² (not ½QV — though they are equivalent). Many students confuse the energy stored on a capacitor with the energy delivered by a battery.
Circular and rotational motion — the angular formulae mirror linear ones, but students sometimes apply the wrong one. Centripetal acceleration always points toward the centre.
For board-specific A-Level resources: A-Level tutoring for Cambridge 9702 and Edexcel International A-Level.
Past Paper Strategy For A*
The single highest-ROI activity in Physics preparation is timed past papers with proper mark-scheme analysis. The A* method:
Sit a full paper under timed conditions, no breaks.
Mark with the official mark scheme, not the textbook answer.
For every lost mark, label the cause: knowledge gap, definition imprecision, missing diagram label, formula rearrangement error, units, sig figs.
Keep an error log — a one-line note per recurring mistake. A* students shrink this log deliberately over weeks.
Our 1-on-1 Physics tutors specialise in Cambridge (0625 / 9702) and Edexcel International — Pure Mechanics through to A-Level capacitors and quantum. Diagnostic-first approach. Free trial.
An A* in IGCSE Physics requires three things: fluent formula rearrangement (drilled to automatic), accurately labelled diagrams (free-body, circuit, ray), and exam-mark-scheme literacy — using the precise definitions the mark scheme expects. Combined with 10+ timed past papers and an error log, it consistently produces A* outcomes.
A-Level Physics A* requires the same fundamentals as IGCSE plus comfort with calculus in physics contexts (differentiation gives velocity from displacement; area under graphs gives impulse and work), confident use of capacitor formulae including the time constant RC and energy stored ½CV², and strong practical skills assessment (uncertainty, graph plotting, evaluating).
IGCSE Physics is moderately demanding but well-defined. The grade ceiling on Core papers is C, so students aiming for A* must sit Extended (Cambridge) or Higher (Edexcel). Most students who put 6-8 hours a week into Physics in the year of the exam, with regular past-paper practice, reach grade 7-8. Reaching A* / 9 requires the additional layer of mark-scheme literacy described in this guide.
Both cover the same major topics — mechanics, waves, electricity, magnetism, thermal physics, modern physics. Cambridge 0625 typically asks more extended-response explanatory questions. Edexcel 4PH1 asks more structured calculation questions with marginally more practical-skills emphasis. Difficulty is broadly comparable.
For IGCSE Physics aiming at A*/9: roughly 5-7 hours a week of focused work in the year of the exam, rising in the final term. For A-Level Physics aiming at A*: roughly 8-10 hours a week across two years, with the heaviest load in the A2 (second) year where the A* is decided. Consistent weekly practice with past papers beats irregular intensive blocks.
Almost always recommended, often required. A-Level Physics uses calculus, vectors, algebra and trigonometry at a level that assumes concurrent A-Level Maths study. Universities sometimes require A-Level Maths alongside Physics for Physics, Engineering and Physical Sciences degrees. Check the specific university and course.
