Exam Overview
The May/June 2024 Physics (9702) AS suite presents a well-calibrated and fair assessment. Paper 1 challenged students on conceptual vector relationships and uncertainties, while Paper 2 tested step-by-step derivations and kinematic modeling. Paper 3 required systematic data collection for a potential divider layout and a mechanical oscillating rod.
Where the Marks Lie
Dynamics and D.C. Circuits represent the heavy hitters of this series. In Paper 2, Question 1 (Dynamics) and Question 6 (Circuits) contributed 10 marks each. A significant chunk of practical marks relied on graphical precision, particularly plotting the fractional variable \(\frac{n}{n+1}\) against distance in Paper 3. Wave-related questions, notably stationary waves on a stretched string, demanded strong analytical graphing skills alongside numerical derivations.
Examiner Pitfalls
Examiners highlighted key areas where candidates frequently dropped marks:
- Kinematic Offsets: In the projectile problem, many students calculated the vertical displacement correctly but forgot to add the initial release height of 1.2 m to find the final height of the wall.
- 2D Momentum Resolution: Resolving velocity components perpendicular to the initial line of motion remains a major stumbling block. Many candidates failed to set up the balanced vertical momentum equations correctly.
- Nuclear Decay Completeness: In particle physics, omitting the bar representing the antineutrino in the beta-minus decay equation led to costly errors.
Strategy & Recommendations
To maximize success in future series, students must master vector resolution and practical graphical analysis. Ensure that definitions are stated verbatim from the syllabus specifications (such as Kirchhoff's first law or the principle of conservation of momentum) and practice plotting graphs with coordinate points plotted to an accuracy of better than half a small square.