IGCSE · 26 September 2026 · 6 min read
IGCSE Physics Paper 5 vs Paper 6: practical test or written alternative?
The most important difference is what you do during the assessment. In Paper 5 you perform practical tasks with apparatus; in Paper 6 you answer written questions about experimental work. Choosing the written alternative does not make practical understanding optional.
This guide addresses Cambridge IGCSE Physics 0625/0972. Edexcel International GCSE practical questions belong to a different assessment structure. Use it to clarify an entry decision with your school, then practise the skills required by the confirmed route.
Compare the assessment setting before judging difficulty
In the Cambridge 0625 2026–2028 structure, Paper 5 lasts 1 hour 15 minutes and Paper 6 lasts 1 hour. Each has 40 marks and contributes 20% of the qualification. Those shared marks do not make the tasks identical: one involves obtaining results using equipment, while the other presents practical situations on paper.
A student confident with a circuit may prefer handling components, while another communicates clearly in written analysis. Neither preference by itself settles the entry. The centre must provide and administer its chosen route. Ask what practical preparation is available and how your performance in real tasks compares with written practical questions.
Understand what remains common to both routes
Both routes need meaningful measurements, suitable tables and graphs, sensible variables, conclusions supported by data and improvements linked to actual limitations. Memorising the phrase repeat for accuracy is not enough. You should explain what is repeated, how the readings are combined and which source of variation the repetition addresses.
For instance, measuring several oscillations and dividing by their number can reduce the relative effect of reaction time. Repeating a measurement does not remove a ruler's fixed zero error. Those ideas matter whether you read a ruler in the examination room or interpret a drawing and a results table in a written question.
Practise a measurement chain from apparatus to conclusion
Consider an original exercise: a student times 20 pendulum oscillations three times, obtaining 28.4 s, 28.6 s and 28.5 s. The mean total time is 28.5 s, so the estimated period is 28.5 / 20 = 1.425 s. A sensible reported value depends on the measurements and instructions; do not round every intermediate step before finishing.
Now explain the method. The student uses the same reference point to start and stop counting, releases the pendulum consistently and measures a small amplitude appropriate to the investigation. Timing one oscillation would make the same reaction-time uncertainty a larger fraction of the result. This combines measurement, calculation and justification in one short practice task.
Learn apparatus limitations through safe supervised work
Where practical facilities and supervision are available, assemble simple low-voltage circuits, take length and time measurements and record repeated results. Notice problems that a polished textbook diagram hides: a loose connection, a scale viewed obliquely, movement before a reading settles or uncertainty about the reference point.
Discuss safety with your teacher and use appropriate school equipment. Do not improvise mains-electricity, high-temperature or laser experiments at home. If you lack lab access, explain the steps from diagrams and results, and ask the centre what preparation or facilities your route requires. Written rehearsal helps reasoning but is not a substitute for every handling skill.
Use a planning answer that someone could follow
Suppose you investigate how wire length affects resistance. State what length changes, how potential difference and current are measured, and how resistance is calculated. Keep relevant features such as wire material and cross-sectional area constant. Explain how to limit heating so temperature does not become an unintended variable.
Specify several suitable lengths, repeated readings where useful, and an appropriate graph or comparison. An answer saying change the length and record results lacks enough detail to reproduce the method. Before checking a model response, ask whether another student could follow your plan without guessing the measured quantities or equipment connections.
Confirm the route and review the right evidence
Ask the exams officer which practical option appears on your entry and whether a change is possible within the centre's current arrangements. Do not assume an individual candidate can freely select either paper at any location. The centre handles apparatus, supervision and entry requirements, so its confirmation matters more than an online preference poll.
Once confirmed, review a representative practical task. Separate apparatus handling, graph construction, calculation and evaluation errors. Fix one weak step, then attempt a different experiment using that skill. When you can explain why a method works and adapt it to new equipment, you are preparing for unfamiliar questions rather than memorising one laboratory script.
Questions, explained
Choose a question for a direct answer, then explore the explanation and supporting resources. Each answer has its own link to save or share.
Is Paper 6 easier than Paper 5 in IGCSE Physics?
There is no universal answer. Paper 5 requires handling apparatus and obtaining measurements; Paper 6 tests practical understanding through written tasks. Compare your actual skills and the preparation your centre provides. Both require experimental reasoning, and the centre must confirm the available entry route.
Do I take both Paper 5 and Paper 6?
In the standard Cambridge IGCSE Physics route, you take one of these practical-assessment alternatives, alongside your multiple-choice and theory papers. Check the component combination on your statement of entry rather than preparing for both as compulsory examinations.
Can I prepare for Paper 6 without doing experiments?
You can practise written experimental analysis without a lab, but practical experience helps you understand instruments, limitations and realistic improvements. Use safe supervised practical work when available. If you are a private candidate, ask your centre about suitable preparation and its entry arrangements.
Why is repeat the experiment not always a good improvement?
Repetition must address a specific limitation. Averaging repeated readings can reduce the effect of random variation, but it does not automatically correct a zero error or a flawed method. State what you repeat, what you calculate and why that helps this experiment.
Can I change from Physics Paper 5 to Paper 6?
Ask your examination centre. The answer depends on its available routes, administration and current entry deadlines. Do not assume a change is possible simply because both papers appear in the syllabus. Obtain confirmation before changing your preparation or paying any amendment fee.