Comprehensive exam-day strategies, common mistakes, and practical guidance for Pearson Edexcel International A Level Physics (YPH11), covering Units 1 to 6.
อ่าน 5 นาทีอัปเดตเมื่อ: 21 มิ.ย. 2569
ภาพรวมข้อสอบ
จำนวนฉบับ
6
คะแนนเต็ม
440
เวลาสอบ
9ชม. 10นาที
ประเภทคำถาม
4
ฉบับ
เวลา
คะแนน
จำนวนข้อ
น้ำหนักคะแนน
ประเภทคำถาม
Unit 1: Mechanics and Materials (WPH11)
1ชม. 30นาที
80
—
—
—
Unit 2: Waves and Electricity (WPH12)
1ชม. 30นาที
80
—
—
—
Unit 3: Practical Skills in Physics I (WPH13)
1ชม. 20นาที
50
—
—
—
Unit 4: Further Mechanics, Fields and Particles (WPH14)
1ชม. 45นาที
90
—
—
—
Unit 5: Thermodynamics, Radiation, Oscillations and Cosmology (WPH15)
1ชม. 45นาที
90
—
—
—
Unit 6: Practical Skills in Physics II (WPH16)
1ชม. 20นาที
50
—
—
—
เกณฑ์เกรด
A*ABCDEU
ข้อกำหนดเครื่องคิดเลข
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
วัตถุประสงค์: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.
ใช้เมื่อใด: Checking solutions, sketching, or solving where an analytic method is hard.
ขั้นตอน
Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.
ข้อควรระวังในการสอบ: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Numerical equation solver
Graphical calculator / GDC (exam mode)
วัตถุประสงค์: Solve an equation or find a variable numerically when an algebraic route is long or implicit.
ใช้เมื่อใด: Iterative or implicit equations, or to confirm an algebraic solution.
ขั้นตอน
Use the equation/zero solver, entering the equation and a sensible starting estimate.
ข้อควรระวังในการสอบ: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Numerical integration & differentiation
Graphical calculator / GDC (exam mode)
วัตถุประสงค์: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.
ใช้เมื่อใด: Checking calculus answers, or where only a numerical value is needed.
ขั้นตอน
Use the GDC's numeric integral / derivative function with the limits or the point.
ข้อควรระวังในการสอบ: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Statistics & probability distributions
Graphical calculator / GDC (exam mode)
วัตถุประสงค์: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.
ใช้เมื่อใด: Statistics questions and hypothesis tests.
ขั้นตอน
Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).
ข้อควรระวังในการสอบ: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
ข้อผิดพลาดที่พบบ่อย
1highคะแนนที่เกี่ยวข้อง: 2Mechanics, Materials, and Thermodynamics
Failing to convert standard prefix units (e.g., mm, cm, ms, g, MeV) into base SI units before substitute-calculating.
วิธีหลีกเลี่ยง: Convert all prefixes (e.g. mm to m, ms to s, g to kg, MeV to J) at the very start of your working before carrying out algebraic manipulations.
Losing accuracy on 'Show that' questions by not showing unrounded intermediate values before the final rounded result.
วิธีหลีกเลี่ยง: State the initial algebraic equation, show the raw substitutions, write down the unrounded intermediate value (to at least 3-4 s.f.), and then write the final rounded answer.
3highคะแนนที่เกี่ยวข้อง: 2Practical Skills in Physics
Drawing a gradient triangle that is too small when calculating experimental gradients from graphs.
วิธีหลีกเลี่ยง: Ensure the gradient triangle spans at least 50% of the drawn line of best fit on your graph, and clearly label the vertex coordinates used.
4mediumคะแนนที่เกี่ยวข้อง: 2Materials and Practical Skills
Forgetting to double the percentage uncertainty of variables that are squared in a formula (e.g., area d^2, or time t^2).
วิธีหลีกเลี่ยง: Apply the fractional uncertainty power rule: %U(x^n) = n * %U(x). For squared quantities, always multiply the individual percentage uncertainty by 2.
5highคะแนนที่เกี่ยวข้อง: 2Mechanics
Misidentifying weight and normal contact force (or weight and magnetic forces) as Newton's Third Law force pairs.
วิธีหลีกเลี่ยง: Newton's Third Law pairs must act on two different bodies, be of the same type of force, and act in opposite directions. Weight and normal contact force act on the same body.
6mediumคะแนนที่เกี่ยวข้อง: 1Waves and Particle Nature of Light
Omitting the factor of 2 in round-trip pulse-echo calculations (e.g., radar, sonar, or ultrasound testing).
วิธีหลีกเลี่ยง: Write down the relationship 2s = v * t for any pulse-echo or round-trip wave scenario to explicitly account for the double journey.
7highคะแนนที่เกี่ยวข้อง: 2Thermodynamics
Using temperature values in Celsius instead of absolute Kelvin in ideal gas or thermodynamics kinetic equations.
วิธีหลีกเลี่ยง: Always convert temperatures to Kelvin using T (K) = theta (C) + 273.15 before substituting values into pV = NkT or mean kinetic energy equations.