An Examiner's Perspective on the June 2025 Physics Papers
The June 2025 Oxford AQA International A-Level Physics series presented a balanced yet demanding challenge to candidates across all five units. While the core knowledge requirements remained firmly rooted in standard physical principles, the level of precision expected in graphical interpretations, vector resolutions, and experimental uncertainty propagation elevated the difficulty of the exam to a solid 4-star level. Success in this series required not only formulaic competency but also a conceptual understanding of how physical quantities vary dynamically.
Where the Marks Were Won and Lost
A significant portion of the marks in Units 1 and 2 was allocated to mechanics and wave superpositions. In the mechanics questions, candidates who clearly resolved forces into their perpendicular components scored highly. However, many candidates struggled with explaining the variations in acceleration—such as the bow and arrow release or the falling parachute—failing to use Newton's second law \( F = ma \) systematically to link net force to changing acceleration. In Unit 5, the core focus on practical skills highlighted a common weakness: identifying and propagating uncertainties. Calculating absolute uncertainties from percentage combinations remained a high-reward area that separated top-tier candidates from the rest.
Examiner Pitfalls to Avoid
One of the most persistent errors highlighted in the examiner reports was the Power of Ten (POT) error. This occurred most frequently when candidates failed to convert physical dimensions from millimeters to meters before calculating nuclear density, Young's modulus, or wire volume. Another common pitfall lay in the interpretation of graphical slopes; examiners noted that tangents drawn on curves must utilize a large triangle (at least half the span of the grid) to ensure precision. Finally, in radioactive decay questions, candidates often lost marks by stating conclusions without demonstrating the mathematical steps or failing to remove anomalies from data sets when calculating the mean diameter of a wire.
Strategic Advice for Upcoming Series
- Always check your units: Create a checklist of conversions during your revision (e.g., GPa to Pa, mm to m, g to kg) to avoid losing easy marks.
- Master the language of graphs: Practice identifying what gradient and area represent for different plots (e.g., the area under a force-time graph represents the change in momentum).
- Lenz's Law clarity: When explaining electromagnetic induction, always structure your answers chronologically: state the change in flux, apply Faraday's law to describe the induced emf, and then use Lenz's law to explain how the induced current opposes the change.
Predictions and Overdue Areas
Based on recent paper patterns, we predict a high likelihood of a complex rotational dynamics question in the next series, potentially focusing on the conservation of angular momentum in rotating systems. Additionally, alternating currents and transformer losses are overdue for a major long-form question, making them high-yield revision targets. Ensure you are fully comfortable with both the theory and the mathematical derivations in these fields.