CCEA AS Physics across four papers: why data analysis outweighs every content topic in our analysis, the sign and unit-conversion slips that wreck otherwise correct calculations, and the graph habits worth fixing before AS 3B.
อ่าน 4 นาทีอัปเดตเมื่อ: 3 ก.ย. 2569
ภาพรวมข้อสอบ
จำนวนฉบับ
4
คะแนนเต็ม
290
เวลาสอบ
5ชม. 30นาที
ประเภทคำถาม
12
ฉบับ
เวลา
คะแนน
จำนวนข้อ
น้ำหนักคะแนน
ประเภทคำถาม
AS 1: Forces, Energy and Electricity
1ชม. 45นาที
100
15
34%
Definition and short explanation, Structured multi-step mechanics or electricity calculation, Graphical plot and analysis, Applied extended context calculation
AS 2: Waves, Photons and Astronomy
1ชม. 45นาที
100
10
34%
Definition and wave characteristics, Practical method description, Ray diagram and optical calculation, Quantum and photon physics calculation, Astrophysical Doppler calculation
AS 3A: Practical Techniques
1ชม.
40
4
14%
Optical ray tracing experiment, Oscillations and timing experiment, Dimensional and density measurement, Electrical circuit resistance measurement
AS 3B: Data Analysis and Evaluation
1ชม.
50
4
17%
Non-linear best fit graph and maxima analysis, Linear graph gradient and physical parameter extraction, Detailed uncertainty and error propagation analysis, Linear intercept mapping and percentage difference
เกณฑ์เกรด
ABCDEU
ข้อกำหนดเครื่องคิดเลข
A scientific calculator is required and must support power, exponential and logarithmic functions and trigonometric functions in degrees or radians, per the specification's mathematical requirements. The general JCQ and CCEA rule applies on top of that: the calculator must have no lid or case with printed instructions or formulae, must not offer symbolic algebra manipulation or a connection to another device, and must not have any retrievable information stored in it, including saved formulae, notes or programs. Clear the memory before the exam and use exam mode if your calculator has one.
AO1: AO1: demonstrate knowledge and understanding of physics ideas, processes, techniques and procedures. (38%)
AO2: AO2: apply knowledge and understanding of physics ideas, processes, techniques and procedures in theoretical and practical contexts, when handling qualitative and quantitative data, and to solve scientific problems. (40%)
AO3: AO3: analyse, interpret and evaluate physics information, ideas and evidence to make judgements and reach conclusions, refine practical design and procedures, and record and communicate reliable, valid observations and measurements. (22%)
Structured mechanics and electricity calculations in one pass
วัตถุประสงค์: Calculate the whole right-hand side of a mechanics or electricity formula in one continuous sequence, without re-entering rounded intermediate numbers.
ใช้เมื่อใด: For any substitution question in mechanics or electricity where the formula involves powers or square roots, such as kinetic energy.
ขั้นตอน
Write the formula first, then substitute and calculate the whole right-hand side in one continuous keystroke sequence using the calculator's power and square root keys, rather than working out intermediate numbers by hand and re-entering them.
ข้อควรระวังในการสอบ: This is a live calculation performed on the numbers given in that question during the exam. CCEA and JCQ rules do not allow any formula, note or program to be stored in the calculator beforehand. Clear the memory before the exam and use exam mode if available.
Percentage uncertainty with a power term
วัตถุประสงค์: Build up the combined percentage uncertainty of a calculated quantity correctly when one of its measured variables is raised to a power.
ใช้เมื่อใด: For uncertainty questions where the formula includes a variable raised to a power, such as thickness cubed.
ขั้นตอน
Calculate the percentage uncertainty of the measured variable, then multiply it directly by the power that variable is raised to in the formula, as one running total, before adding the other percentage uncertainties.
ข้อควรระวังในการสอบ: This is a live calculation applied to your own measurements or the figures given in the exam. No formula, note or program may already be stored in the calculator when the exam begins.
Standard form entry for photon and Doppler calculations
วัตถุประสงค์: Enter a very small or very large physical constant, such as Planck's constant or the speed of light, correctly in standard form.
ใช้เมื่อใด: For photon energy or Doppler effect calculations that use constants from the formula sheet with very small or very large values.
ขั้นตอน
Use the EXP or times-ten-to-the-power key to enter very small or very large values, such as Planck's constant or the speed of light from the formula sheet, directly in standard form rather than typing every digit by hand.
ข้อควรระวังในการสอบ: This is a live entry technique for constants printed on the formula sheet provided in the exam. Storing constants, formulae or programs in the calculator's memory in advance is not permitted.
ข้อผิดพลาดที่พบบ่อย
1mediumคะแนนที่เกี่ยวข้อง: 2Refraction
Leaving fringe separation or slit spacing in millimetres when calculating an optical wavelength with \( \lambda = \frac{ay}{d} \), which expects the values in metres.
วิธีหลีกเลี่ยง: Convert slit spacing and fringe separation to metres on their own working line before substituting into the formula.
2mediumคะแนนที่เกี่ยวข้อง: 2Principle of moments
Omitting the perpendicular component when resolving forces in a moments calculation on an angled structural bracket, using the full force rather than its perpendicular component.
วิธีหลีกเลี่ยง: Resolve the force into its perpendicular component first, then multiply by the perpendicular distance from the pivot, rather than using the raw force value.
3mediumคะแนนที่เกี่ยวข้อง: 2Analysis (AS 3 Practical and Theory)
Choosing a graph scale that leaves the plotted data occupying less than half the grid on one or both axes.
วิธีหลีกเลี่ยง: Work out the full range of your x and y values before you plot anything, then pick a scale that lets the data fill more than half of each axis.
4mediumคะแนนที่เกี่ยวข้อง: 2Evaluation (AS 3 Practical and Theory)
Forgetting to multiply a percentage uncertainty by the exponent when a variable such as \( T^4 \) or \( r^3 \) is raised to a power inside a formula.
วิธีหลีกเลี่ยง: Multiply the percentage uncertainty of that variable by the power it is raised to, before combining it with the other uncertainties in the calculation.
5highคะแนนที่เกี่ยวข้อง: 2Work done, potential energy and kinetic energy
Missing a unit conversion during a multi-step energy calculation, for example leaving energy in megajoules or time in hours instead of converting to joules and seconds.
วิธีหลีกเลี่ยง: Convert every non-SI value to SI units on a separate line before starting the main calculation, so the conversion is a checkable step, not a mental one.
6mediumคะแนนที่เกี่ยวข้อง: 2Analysis (AS 3 Practical and Theory)
Drawing an undersized gradient triangle, under 5 cm along either axis, when calculating a gradient on an AS 3B data-analysis graph.
วิธีหลีกเลี่ยง: Pick two points on the line of best fit at least 5 cm apart before you draw the triangle, on whichever axis you use to measure it.
7mediumคะแนนที่เกี่ยวข้อง: 1Internal resistance and electromotive force
Omitting the negative sign when stating or calculating a gradient that represents internal resistance, quoting the value of \( -r \) as a positive number.
วิธีหลีกเลี่ยง: Read the sign of the gradient directly from the direction the line slopes on the graph, and keep that negative sign both in the gradient statement and in any quoted resistance value.
8mediumคะแนนที่เกี่ยวข้อง: 2Linear momentum and impulse
Failing to account for the vector sign change when calculating the change in momentum for a rebounding body, calculating \( |v_1| - |v_2| \) instead of \( v_1 - (-v_2) \).
วิธีหลีกเลี่ยง: Assign a positive direction first, give the rebound velocity a negative sign, and calculate the change using the signed values rather than subtracting the two speeds.