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Physics

A Level Physics — Course Overview

Section titled “A Level Physics — Course Overview”

A Level Physics is the study of the fundamental laws governing the universe, from the subatomic Scale to the cosmological. The course develops mathematical modelling skills, experimental Technique, and the ability to reason from first principles.

Board Coverage

Section titled “Board Coverage”
TopicAQAEdexcelOCR (A)CIE (9702)
Measurements & UncertaintiesPaper 1CP1Paper 1P1
Mechanics & MaterialsPaper 1CP1, CP2Paper 1P2
WavesPaper 2CP2Paper 2P2
ElectricityPaper 1CP2Paper 2P2
Thermal PhysicsPaper 2CP3Paper 2P2
Fields (Gravitational & Electric)Paper 2CP3Paper 2P4
Nuclear & Quantum PhysicsPaper 2CP3Paper 2P4
Astrophysics (Optional)Paper 2CP5Paper 2—
Particle PhysicsPaper 1CP1Paper 1—

Course Structure

Section titled “Course Structure”

Core Modules

Section titled “Core Modules”
  1. Mechanics. Kinematics, dynamics, energy, momentum, and circular motion
  2. Waves. Progressive and stationary waves, interference, diffraction, and the wave-particle duality
  3. Electricity. Current, resistance, DC circuits, and electromagnetism
  4. Fields. Gravitational fields, electric fields, magnetic fields, and their unification
  5. Thermal Physics. Kinetic theory, ideal gas laws, and thermodynamic processes
  6. Nuclear & Quantum Physics. Radioactivity, nuclear decay, energy levels, and photoelectricity
  7. Astrophysics. Stellar evolution, cosmology, and observational astronomy (optional on some boards)

Assessment

Section titled “Assessment”
BoardPapersFormat
AQAPaper 1, 2, 3Written + practical endorsement
EdexcelCP1–CP6Written + practical endorsement
OCR (A)Paper 1, 2, 3Written + practical endorsement
CIEPaper 1–4Written + practical exam (P5)

All boards require a practical skills endorsement (pass/fail), assessed either through a portfolio (AQA, Edexcel, OCR) or a dedicated practical paper (CIE).

How to Use These Notes

Section titled “How to Use These Notes”

Each topic page follows a consistent structure:

  1. Physical principles. The underlying laws and their mathematical formulation
  2. Derivations. Where key results come from, not just what they are
  3. Worked examples. Applying principles to progressively harder problems
  4. Intuition. Physical reasoning that makes the maths feel natural
  5. Multi-step problem set. Exam-style questions requiring chain reasoning
  6. Board-specific notes. Specification differences highlighted

When finished, attempt the to identify gaps.

Cross-References

Section titled “Cross-References”
  • Mechanics — Kinematics, dynamics, and momentum form the foundation of classical mechanics.
  • Waves — Progressive and stationary waves, interference, and diffraction describe oscillatory phenomena.
  • Electricity — Current, resistance, and DC circuits are central to understanding electrical systems.
  • Fields — Gravitational, electric, and magnetic fields unify the forces acting at a distance.

Key Exam Board Differences

Section titled “Key Exam Board Differences”
AspectAQAOCR (A)CIE (9702)
Practical12 required activities (endorsement)Practical endorsement (PAGs)Paper 5 practical exam
Data SheetFull formula booklet providedFull formula booklet providedLimited formula list
Multiple ChoicePaper 1 (60 marks)Paper 1 (70 marks)Paper 1 (40 marks)
CalculatorsPermitted in all papersPermitted in all papersPermitted except Paper 1

Key Formulae

Section titled “Key Formulae”
TopicFormula
Kinematicsv2=u2+2asv^2 = u^2 + 2as
ForceF=maF = ma, Weight W=mgW = mg
EnergyEk=12mv2E_k = \frac{1}{2}mv^2, Ep=mghE_p = mgh
Wavesv=fλv = f\lambda, T=1fT = \frac{1}{f}
CoulombF=q1q24πε0r2F = \frac{q_1 q_2}{4\pi\varepsilon_0 r^2}
GravitationalF=GMmr2F = \frac{GMm}{r^2}, g=GMr2g = \frac{GM}{r^2}

Study Strategy

Section titled “Study Strategy”
  1. Learn derivations. Examiners test whether you understand where formulae come from, not just how to plug in numbers.
  2. Show all working. Method marks are the majority of the total; a wrong answer with correct method scores heavily.
  3. Practise multi-step problems. Real exam questions chain 3—4 concepts together.
  4. Master uncertainties. Every board tests error propagation and significant figures.
  5. Draw diagrams. A clear force diagram, circuit diagram, or ray diagram often earns marks before any calculation.
  6. Check your answer. Verify units, order of magnitude, and physical reasonableness.

Key Prefixes

Section titled “Key Prefixes”
PrefixSymbolValue
gigaG10910^9
megaM10610^6
kilok10310^3
millim10−310^{-3}
microμ\mu10−610^{-6}
nanon10−910^{-9}
picop10−1210^{-12}

Summary

Section titled “Summary”

The key principles covered in this topic are linked in the sub-pages above. Focus on understanding the definitions, applying the formulas or frameworks, and evaluating strengths and limitations of each approach.

Worked Examples

Section titled “Worked Examples”

Worked examples demonstrating the application of key concepts are covered in the detailed sub-pages linked above.

Common Mistakes

Section titled “Common Mistakes”

Confusing scalar and vector quantities: Speed is a scalar; velocity is a vector. Distance is a scalar; displacement is a vector. Mass is a scalar; weight is a vector (force due to gravity). Students often use these interchangeably, but in physics the distinction matters for calculations involving direction.

Forgetting to convert units: Physics problems often mix units (km/h, g, mm). Always convert to SI units (m, kg, s) before calculating. A common error is using speed in km/h with distance in metres, giving a time in the wrong units.

Confusing mass and weight: Mass (kg) is the amount of matter in an object. Weight (N) is the gravitational force on it: W=mgW = mg. Mass is constant; weight depends on the gravitational field. On the Moon, your mass is the same but your weight is about one-sixth of Earth’s.