October/November 2025 Physics (9702) Examination Verdict
The 2025 series delivered a beautifully balanced set of papers that thoroughly tested the core AS-level syllabus. With Paper 1 requiring swift conceptual navigation, Paper 2 demanding rigorous mathematical precision, and Paper 3 challenging experimental dexterity, students had to be at the top of their game. Equilibrium of Forces emerged as the most dominant topic across the series, anchoring the 20-mark practical investigation in Paper 3 and featuring prominently in Paper 2.
Where the Marks Are Won (and Lost)
A substantial portion of the marks lay in Kinematics, Work-Energy-Power, and Deformation of Solids. In Paper 2, candidates who mastered multi-step energy conversions (such as GPE to EPE transitions in the bungee jumping scenario) scored highly. However, a common examiner pitfall was the failure to properly articulate stationary wave formation. Many students lost marks by simply stating that waves 'meet' without specifying that they are identical progressive waves travelling in opposite directions that superpose. Similarly, in the electricity questions, minor mathematical errors—such as neglecting to halve the diameter to find the radius or mismanaging powers of ten—frequently turned an easy 3-mark calculation into a costly error.
Crucial Examiner Insights & Pitfalls
According to the marking schemes, the most common pitfall in experimental questions was the lack of detail in uncertainty propagation. For instance, when calculating the uncertainty in resistivity, students often forgot that the fractional uncertainty of the wire diameter must be multiplied by two because the cross-sectional area is proportional to the square of the diameter. Additionally, in Paper 3, many candidates struggled with graph plotting, choosing awkward scales (e.g., blocks of 3 or 7) that led to systematic errors during read-offs of the gradient and y-intercept.
Strategic Advice for Upcoming Series
- Master Unit Definitions & Laws: Never lose easy marks on fundamental statements like Hooke's Law, the principle of superposition, or the definition of torque of a couple.
- Double-Check Your Squaring: Whenever an equation squares a variable with a measured uncertainty (like radius, diameter, or time), double its percentage uncertainty!
- Succeed in Paper 3: Always select sensible scales (1:2, 1:5, 1:10) for your graphs. Ensure your line of best fit has an even distribution of points on either side and that you show your gradient triangle calculations clearly using a hypotenuse that is more than half the length of your drawn line.
Next-Series Predictions
Given the heavy focus on mechanical equilibrium and basic wave properties in this series, future exams are highly likely to place a greater emphasis on potential divider circuits (LDR/thermistor networks) and Doppler effect calculations. Additionally, expect to see questions testing the microscopic model of electric current (\( I = Anvq \)) and more demanding conservation law applications in radioactive decay reactions.