A comprehensive study and exam preparation package for OCR AS Level Physics A (H156), featuring an in-depth breakdown of Papers 1 and 2, recurring practical and mathematical pitfalls from recent examiner reports, and targeted advice on structuring high-scoring written responses.
閱讀時間 4 分鐘更新於: 2026年6月21日
試卷概覽
卷數
2
總分
140
考試時間
3小時
題型
2
試卷
時間
分數
題數
比重
題型
Breadth in Physics
1小時 30分鐘
70
26
50%
選擇題, structured-written-calculation
Depth in Physics
1小時 30分鐘
70
8
50%
structured-and-extended-response
評級
ABCDEU
計算機規定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: Knowledge and understanding of scientific ideas, processes, techniques and procedures (35%)
AO2: Application of knowledge and understanding of scientific ideas, processes, techniques and procedures (40%)
AO3: Analyse, interpret and evaluate scientific information, ideas and evidence (25%)
根據歷屆試題與評分準則整理（2022–2024）。
計算機程式
Graph: zeros, intersections & turning points
Graphical calculator / GDC (exam mode)
用途: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.
使用時機: Checking solutions, sketching, or solving where an analytic method is hard.
步驟
Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Numerical equation solver
Graphical calculator / GDC (exam mode)
用途: Solve an equation or find a variable numerically when an algebraic route is long or implicit.
使用時機: Iterative or implicit equations, or to confirm an algebraic solution.
步驟
Use the equation/zero solver, entering the equation and a sensible starting estimate.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Numerical integration & differentiation
Graphical calculator / GDC (exam mode)
用途: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.
使用時機: Checking calculus answers, or where only a numerical value is needed.
步驟
Use the GDC's numeric integral / derivative function with the limits or the point.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Statistics & probability distributions
Graphical calculator / GDC (exam mode)
用途: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.
使用時機: Statistics questions and hypothesis tests.
步驟
Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
常見錯誤
1high涉及分數: 2The photoelectric effect
Forcing the line of best fit through the origin in graphical calculations for the photoelectric effect, neglecting the work function.
如何避免: Remember that in a plot of maximum kinetic energy of photoelectrons against frequency, the horizontal intercept represents the threshold frequency and the vertical intercept represents the work function. Do not force the line through (0,0).
2high涉及分數: 1Resistivity
Failing to convert cross-sectional area units from square millimeters to square meters in resistivity calculations.
如何避免: Always multiply values in square millimeters by 10^-6 (not 10^-3) to convert them into square meters before substituting them into R = rho*L/A.
3medium涉及分數: 2Stationary waves
Treating the distance between two adjacent nodes of a stationary wave as a full wavelength.
如何避免: Recall that the distance between adjacent nodes (or adjacent antinodes) is exactly equal to half a wavelength (lambda / 2). Always double this measured distance to get the full wavelength for wave speed calculations.
4high涉及分數: 2Collisions
Omitting the minus sign when calculating relative velocity or momentum change after a elastic collision where direction is reversed.
如何避免: Always establish a positive direction before calculating momentum. If the final velocity is opposite to the initial velocity, its value must be substituted as a negative number: change in momentum = m*v - m*u = m*(v - (-u)) = m*(v + u).
5medium涉及分數: 1Measurements and uncertainties
Failing to draw line of best or worst fit across more than half of the grid in uncertainty calculations.
如何避免: Always extend your lines of best and worst fit over at least half the length of the coordinate grid plotted. Small, truncated lines are heavily penalized by examiners.
6medium涉及分數: 2Circuit symbols
Incomplete or incorrect circuit diagrams where voltmeters are placed in series or thermistor symbols are incorrect.
如何避免: Ensure voltmeters are strictly placed in parallel across the component. Review and memorize the standard OCR symbol for a thermistor (rectangle with a diagonal line ending in a flat line) vs a variable resistor.