June 2022 AQA AS Physics (7407) Exam Analysis

The June 2022 AS Physics papers presented a rigorous challenge to candidates, striking a balance between classical mechanics, modern quantum concepts, and practical laboratory techniques. With an overall difficulty index of 3.8 out of 5, this series tested not just rote memorisation but deep analytical reasoning, particularly through graph-based evaluations and experimental uncertainty calculations.

Key Areas of Mark Allocation

Across the two papers, marks were heavily concentrated in several core chapters:

  • Force, energy and momentum: Leading the subject weight with 35 marks, questions in this category challenged students with moments, velocity-time graph analysis, and impulse-momentum relationships.
  • Current electricity: Comprising 27 marks, testing was highly focused on non-ohmic components (filament lamps) and potential divider circuits.
  • Practical Skills and Measurements: Accounting for 14 marks, Section A of Paper 2 demanded high precision in drawing maximum/minimum lines of best fit, calculating percentage uncertainties, and identifying systematic errors.

Examiner Reports & Student Pitfalls

Examiners highlighted several recurring mistakes that cost candidates vital marks:

  • Uncertainty & Graph Work: In Paper 2 Q1, candidates struggled with the concept of a systematic delay. While many correctly identified the "systematic error," many failed to accurately describe how the resulting graph of \( 2s \) against \( t^2 \) would shift downward or to the right.
  • Unit and Power-of-Ten Conversions: Forgetting to convert milliseconds or microseconds before executing calculations was a major pitfall in both the waves and mechanics questions.
  • Scaling & Ratios: In the Materials comparison question (Paper 1 Q6), when the radius was halved, several students forgot that the cross-sectional area changes by a factor of 4, leading to incorrect extension gradients.
  • Vague Explanations: Questions demanding quality of written communication, such as explaining electron diffraction or the photoelectric effect, often received generic responses that lacked key terms like "one-to-one interaction" or "de Broglie wavelength."

High-ROI Revision Strategies

To succeed in future sessions, candidates should prioritise:

1. Graph Skills: Regularly practice drawing worst-case lines of fit and tangents on curved velocity-time graphs to secure the maximum gradient marks.
2. Derivations & Scaling: Work through algebraic questions where multiple variables change simultaneously (e.g., Young's Modulus and resistivity).
3. Core Definitions: Master precise physical definitions (such as "coherent sources" and "work function") to guarantee easy marks in qualitative structured questions.