Whether you should take Physics at A Level isn’t really a question the syllabus document can answer. The syllabus tells you what content is on each paper. What it doesn’t tell you is what the year is actually like — what changes between IGCSE and AS, what catches people off-guard six weeks in, what makes the students who stay glad they did.
This is the conversation I wish someone had sat me down for. Students who’ve just finished 0625 and are wavering have asked me what’s really different. Here’s the honest version.
The maths step is bigger than the physics step
At IGCSE, a calculation question gives you the formula and asks you to substitute. You memorise F = ma, ρ = m/V, v = fλ, and the actual maths is GCSE-grade arithmetic and rearrangement.
At AS, the formula sheet still exists, but the formulas combine. You’ll be expected to:
- Resolve a vector into components (trig you learned at GCSE, but used reflexively)
- Rearrange an equation with the unknown buried in a fraction-of-a-fraction
- Take logs to linearise an exponential relationship — and recognise when to
- Compute the gradient of a graph as part of an answer, with uncertainty propagated through
None of this is new maths. It’s all GCSE-Maths or IGCSE-Additional-Maths content. What’s new is the speed at which you’re expected to deploy it without thinking. The bottleneck for most struggling AS Physics students isn’t the physics — it’s that the maths step takes them long enough to break their pacing.
Multiple choice changes character at AS
You sat IGCSE Paper 1 (Core MCQ) or Paper 2 (Extended). The traps you saw — definition slips, unit prefix misreads, sign errors — are real, and they carry through to A Level.
But AS Paper 1 has 40 questions in 75 minutes, and the distractors are designed by people who know what IGCSE-trained students will be tempted to do. “F = ma” thinking works for most things at IGCSE. At AS, you’ll see questions where “F = ma” is the distractor — and the correct answer comes from “F equals rate of change of momentum” (which simplifies to F = ma only when mass is constant). The IGCSE intuition is the trap.
There’s also more vector work. More graph-reading. More questions where the answer depends on a derivation rather than a recognition.
Practical work is graded, and graded harder
At IGCSE, your practical mark comes from Paper 5 (Practical Skills) or Paper 6 (Alternative to Practical). At A Level you sit two: Paper 3 at AS, which is a hands-on practical exam where you walk into a lab, set up apparatus, take measurements, analyse, and evaluate. Then Paper 5 at A2, which is planning and analysis on paper.
Together they make up a substantial share of the A Level marks. If you found IGCSE practical fiddly or boring, A Level practical work is more of that — graded against tighter criteria.
What examiners want is specific: significant figures matching instrument precision, line of best fit drawn (not dot-to-dot), gradient triangles shown on the graph using points on the line not data points, uncertainty propagated through to the final answer. None of it is intellectually hard. All of it has to be habit.
The topics that felt weird at IGCSE come back harder
The IGCSE topics that felt qualitative — electric fields, magnetic effects, oscillations — come back at AS and A2 quantitative. You won’t just describe the field around a charge; you’ll calculate the field strength at a point using Coulomb’s law. You won’t just describe electromagnetic induction; you’ll use Faraday’s law with rate-of-change reasoning.
If a topic felt fuzzy at IGCSE, it gets more demanding, not less. Conversely: if you found the qualitative side intuitive, the quantitative version will mostly click.
A2 introduces physics you’ve never met at IGCSE
The second year of A Level introduces content that has no IGCSE precursor:
- Quantum — photoelectric effect, de Broglie wavelengths, energy levels in atoms
- Nuclear — binding energy, mass defect, decay constant
- Capacitor charging and discharging, with exponentials
- Damped and driven oscillations, including resonance
- Gravitational fields treated quantitatively (Newton’s law of gravitation, orbital motion)
This is the part of A Level that subject-switchers cite as the reason they’re glad they stayed. It’s also the part that the pop-science version of physics you’ve been exposed to (YouTube, documentaries, that one really good Brian Cox programme) actually maps onto — quantum is the bit you’ve heard about, finally introduced rigorously.
Pace is the AS P1 trap, not difficulty
40 questions in 75 minutes is just under two minutes per question. That’s tight, and it’s tight in a different way to IGCSE Paper 1.
At IGCSE you could read a question, recognise the trap, and answer in 30 seconds. AS P1 questions have more steps embedded: a question might require resolving a vector, applying a formula, then identifying which distractor is the right magnitude with the right sign. Each step is small; the cumulative time is the issue.
A Level Maths makes Physics easier; the reverse isn’t true
A Level Physics is doable without A Level Maths. It’s much easier with it. Every concept you learn in A Level Maths — calculus, advanced trig, exponentials, logs, vectors — helps you in Physics, often immediately.
The reverse isn’t true to the same degree. Taking Physics alongside Maths feels like the Maths content overlaps and reinforces. Taking Physics without Maths means teaching yourself the maths content you don’t see in class.
The honest answer to “should I take it?”
If you got a strong grade at IGCSE and you found the physics genuinely interesting — not just doable — yes, take it. The mathematical demand steps up; the topic depth steps up; the work-rate expectation steps up. But it’s also the year where physics goes from being “a school subject” to being a tool that explains how the world works at a more fundamental level. That shift is worth the work.
If you got the grade but found the physics tedious, don’t pick it because it sounds prestigious. There are more compatible subjects for someone who doesn’t actually enjoy the subject.
If you didn’t get the grade you wanted at IGCSE — that’s a separate conversation. The right move is sometimes a resit, sometimes a foundation course, sometimes a different subject. Don’t decide that one alone; talk to your physics teacher first.
What to do this summer if you’re leaning toward yes
If you’ve decided (or you’re leaning toward yes), use the summer for two things:
Algebra and trig fluency. Work through the GCSE Maths topics on rearrangement, indices, trig identities, log rules — get them reflexive. The maths step at AS is fast; the bottleneck is fluency, not knowledge.
Get familiar with the AS syllabus. Skim the 9702 syllabus document (it’s on the Cambridge site). Look at the first three units (Physical quantities and units; Kinematics; Dynamics) — they’re an extension of IGCSE Mechanics with more vector work. Working through them in advance means the first four weeks of AS aren’t catch-up.
If you want a tour of the territory before September, the existing 9702 tools on CIE Insider preview what the year asks of you: the AS definitions trainer, the A2 definitions trainer, the uncertainties drill, the P5 cheatsheet. None of them are revision for AS; they’re a window into how AS thinks about its content.
If you’ve decided no — that’s fine too. The MCQ trainer, definitions, P5 and P6 guides all stay free, the past papers stay free, and you can come back if anything changes.
Preview the AS year on the 9702 trainers
Free interactive tools for AS and A2 Physics — definitions, uncertainties, Paper 5 cheatsheet. No sign-up required.