IGCSE vs A-Level Physics: What Actually Changes?

Short answer: A-Level Physics (9702) covers many of the same topics as IGCSE, but goes far deeper and demands much more maths. The biggest changes are the level of algebra, the multi-step reasoning, the detailed practical skills, and an exam style that rewards precise explanations. It is a real step up, but a manageable one if you expect it.

The topics overlap more than you think

Most A-Level Physics topics have an IGCSE ancestor. Forces, energy, waves, electricity, and radioactivity all appear at both levels. What changes is how deeply each is treated.

Topic	IGCSE approach	A-Level (9702) approach
Forces	Balanced and unbalanced, $F = ma$	Resolving vectors, moments, equilibrium, momentum
Electricity	Current, voltage, resistance	Internal resistance, potential dividers, Kirchhoff's laws
Waves	Reflection, refraction basics	Superposition, interference, diffraction gratings
Motion	Speed, simple graphs	Full suvat, projectiles, circular motion
Radioactivity	Types of decay, half-life	Decay constant, exponential equations

So you rarely start from zero. You revisit familiar ground with sharper tools.

The maths is the real jump

This is what most students underestimate. IGCSE Physics maths is mostly substituting numbers into a formula. A-Level expects you to:

• Rearrange equations algebraically before substituting.
• Work in standard form and handle unit prefixes confidently.
• Use trigonometry to resolve vectors.
• Interpret gradients and areas under graphs as physical quantities.
• Follow exponential relationships, for example in radioactive decay and capacitor discharge.

If you are also taking A-Level Maths, most of this feels natural. If not, it is the area worth practising first.

Questions get longer and more layered

At IGCSE, a typical calculation is one step: put numbers into $v = u + at$ and solve. At A-Level, a single question might ask you to resolve a force, apply Newton's second law, then use the result in an energy calculation. The marks are spread across the chain, so you need to carry a result cleanly from one step to the next.

Explanations also carry more weight. A-Level mark schemes reward precise reasoning, so vague answers that would scrape a mark at IGCSE often score nothing.

Practical work becomes a formal skill

Both levels involve experiments, but 9702 treats practical skills as a graded discipline in their own right (assessed through the practical papers). You are expected to:

• Identify independent, dependent, and control variables.
• Plot graphs with sensible scales and lines of best fit.
• Calculate gradients and intercepts, and link them to a physics equation.
• Estimate and combine uncertainties, and quote answers to a sensible number of significant figures.

Uncertainty analysis in particular is new territory for most IGCSE students.

How the exams compare

Feature	IGCSE Physics	A-Level Physics (9702)
Maths level	Substitution	Algebra, trig, graphs
Question style	Mostly single step	Multi-step, combined topics
Explanations	Brief	Detailed, mark-scheme precise
Practical assessment	Light	Formal, including uncertainties
Data and formula sheet	Limited	Provided, but you must know how to use it

How to make the transition smoother

• Shore up the maths early. Practise rearranging equations and resolving vectors before the topics rely on them.
• Learn the command words. A-Level rewards knowing the difference between state, describe, and explain.
• Show full working. Method marks are everywhere, so never jump straight to an answer.
• Get comfortable with uncertainties. It feels awkward at first but becomes routine with practice.
• Do past papers under timing. The step up in question length means pacing matters more than at IGCSE.

The bottom line

A-Level Physics is not a different subject from IGCSE, it is the same subject taken seriously. The topics are familiar, but the maths, the reasoning, and the practical rigour all step up together. Students who expect that jump and build their maths early tend to settle in quickly.

If you want support with the transition, ExamPal is an AI tutor that already knows the 9702 syllabus and marks your answers against the Cambridge mark scheme, so you can see exactly where the A-Level standard differs from what you were used to at IGCSE.