Cambridge International A Level Physics (9702) exam tips grounded in recent examiner reports: avoid power-of-ten unit-conversion errors, give precise definitions (radian, simple harmonic motion), handle 'Show that' derivations rigorously, master the practical papers (Papers 3 & 5) graph and line-of-best-fit technique, and apply command words correctly in thermal and nuclear physics.
阅读时间 4 分钟更新于: 2026年6月21日
试卷概览
卷数
5
总分
270
考试时间
7小时 45分钟
题型
4
试卷
时间
分数
题数
比重
题型
Paper 1 Multiple Choice
1小时 15分钟
40
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Paper 2 AS Level Structured Questions
1小时 15分钟
60
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Paper 3 Advanced Practical Skills
2小时
40
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Paper 4 A Level Structured Questions
2小时
100
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Paper 5 Planning, Analysis and Evaluation
1小时 15分钟
30
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评级
A*ABCDEU
计算器规定
A silent scientific calculator is required where the syllabus permits one. It must NOT be graphical, programmable, or capable of symbolic algebra (CAS), and it must contain no stored programs or notes.
AO1: Knowledge with understanding (37%)
AO2: Handling, applying and evaluating information (38%)
AO3: Experimental skills and investigations (25%)
根据历届试题与评分标准整理（2023–2025）。
计算器程序
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用时机: Solving or sketching a function when you want to find where its graph crosses or turns.
步骤
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用时机: Any data-handling, statistics, or required-practical analysis question.
步骤
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用时机: Multi-step calculations where premature rounding loses the final accuracy mark.
步骤
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用时机: As a check only, after solving by hand.
步骤
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
常见错误
1high涉及分数: 2Resistance and resistivity
Using the diameter of a wire or sphere directly as the radius in upthrust or resistance calculations.
如何避免: Always check whether you are given the diameter or radius in the question table or text. Divide the diameter by 2 before squaring to find the cross-sectional area (A = pi * r^2).
2high涉及分数: 1Gravitational potential
Omitting the negative sign when calculating gravitational potential or gravitational potential energy.
如何避免: Remember that gravitational potential is defined as work done per unit mass in bringing a test mass from infinity to a point. Because gravity is always attractive, potential is always negative relative to infinity, where it is zero.
3medium涉及分数: 1Specific heat capacity and specific latent heat
Adding 273 to a change in temperature (delta T) instead of keeping the magnitude of change identical.
如何避免: A temperature change of 1 degree Celsius is exactly equal to a change of 1 Kelvin. Never add 273 to a delta T value during thermal energy calculations.
4medium涉及分数: 2Errors and uncertainties
Drawing a straight line of best fit in Paper 5 that uses a false origin to directly read off the y-intercept.
如何避免: If the x-axis does not start at absolute zero, do not read the y-intercept directly off the vertical axis. Instead, select a point (x, y) on your line of best fit and use the equation y = mx + c to calculate c.
5high涉及分数: 1Radioactive decay
Omitting the electron neutrino or electron antineutrino from beta decay nuclear equations.
如何避免: Check the charge of the beta decay. Beta-minus decay emits an electron antineutrino to conserve lepton number, while beta-plus decay emits an electron neutrino.