Overall Verdict & Difficulty
The 9702 May/June 2026 examination series represents a standard yet rigorous Cambridge International assessment, landing at a difficulty index of 3.4 out of 5. The paper set balances high-accessibility factual recall and standard formulaic calculations with high-discrimination analytical questions—notably the multi-stage thermodynamic cycle in Paper 4, quadratic propagation of errors in Paper 5, and coupled-spring non-linear dynamics in Paper 3.
Where the Marks Are Distributed
Core syllabus areas dominate the mark distribution across both AS and A2 components:
- Practical & Experimental Skills (Papers 3 & 5): Totaling 70 marks (25.9% of the overall suite), requiring precise gradient determination, error bar handling, worst acceptable line evaluation, and exhaustive 6-point additional experimental design detail.
- Measurement, Mechanics & Materials: Heavily weighted in Paper 1 and Paper 2, focusing on projectile dynamics, variable-mass rocket acceleration, Hooke’s law, and energy conservation.
- Electromagnetism & Fields: Spread across Papers 1, 2, and 4, demanding sound spatial reasoning (right-hand/left-hand rules in mass spectrometry) and formal derivations of capacitor network formulae.
- Modern & Thermal Physics: High representation via Wien’s law, X-ray production mechanisms, nuclear binding energy/mass defects, and cyclic First Law thermodynamics.
Examiner Pitfalls & Critical Loss Areas
Key areas where candidates frequently drop marks include:
- Vector and Directional Precision: Conflating electric field (vector direction towards the negative charge) with electric potential (scalar algebraic sign) at midpoint geometries.
- Rigorous Definitions: Omitting critical phrases such as 'per unit mass moving from infinity' for gravitational potential, or 'per unit current per unit length' when defining magnetic flux density.
- Uncertainty Arithmetic: Forgetting to double fractional uncertainties when raising variables to powers (e.g., \(\Delta(d^{-2}) = 2\frac{\Delta d}{d}\times d^{-2}\)) and drawing worst acceptable lines that fail to intersect every error bar box.
- Significant Figures & Unit Tracking: Omitting prefix conversions (e.g., converting \(\text{mm}^{-2}\) to \(\text{m}^{-2}\) or failing to quote answers to consistent significant figures derived from raw data).
Preparation Strategy & Trend Predictions
To maximize examination performance, students should focus on mastering precise syllabus definitions verbatim, practicing multi-variable linearization for Paper 5 planning questions, and reinforcing thermal physics derivations. Circular motion satellites and quantum wave-particle duality are prime candidates for higher weighting in subsequent series.