Key term
AQA GCSE Combined Science Physics 8464
Atomic Structure
Topic overviewThe structure of an atomMass number, atomic number and isotopesFrom the plum pudding model to the nuclear modelChadwick, the neutron, and comparing the modelsRadioactive decay and nuclear radiationNuclear equationsHalf-lives and the random nature of radioactive decayRadioactive contamination
Electricity
Topic overviewCircuit symbols, electrical charge and currentCurrent, resistance and potential differenceOhmic conductors, filament lamps, diodes and thermistorsLight-dependent resistors, and investigating resistanceCurrent and potential difference in series and parallelConstructing circuits, and calculating in series circuitsDirect and alternating potential difference, and mains electricityPower and efficiencyAppliances, and the energy transferred by electrical workPower, and the power ratings of domestic appliancesThe National Grid
Energy
Forces
Topic overviewScalars, vectors, forces and the resultant forceGravityWork done and energy transferStretching, compressing, and the spring constantLinear and non-linear extension, and work done on a springDistance, displacement and speedThe speed of sound, and the distance-speed-time equationVelocity and the distance-time relationshipAcceleration, deceleration and velocity-time graphsArea under a velocity-time graph, and the uniform acceleration equationNewton's First LawNewton's Second and Third LawsStopping distance and reaction timeFactors affecting braking distanceBraking force, deceleration and the dangers of stopping quickly
Magnetism and Electromagnetism
Particle Model of Matter
Waves
Wave properties, and refraction at a boundary
- 3 things to know
- Physics Paper 2
Overview
Amplitude, wavelength, frequency and period, the equation linking period and frequency, the hertz, wave speed and the wave equation with calculations, measuring the angles of incidence and refraction from the normal, which way a ray bends entering a glass block, and comparing the infrared emitted by different surfaces using a cube of hot water.
What you need to know
Answer each one before you reveal it.
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Key term
Name the four quantities used to describe the motion of a wave.
Key term
What is the amplitude of a wave?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name the four quantities used to describe the motion of a wave.
Model answer
Amplitude, wavelength, frequency and period.
- 2
What is the amplitude of a wave?
Model answer
The maximum displacement of a point on the wave away from its undisturbed position.
- 3
What is the wavelength of a wave?
Model answer
The distance from a point on one wave to the equivalent point on the next wave.
- 4
What is the frequency of a wave?
Model answer
The number of waves passing a point each second.
- 5
State in words how the period of a wave is related to its frequency.
Model answer
The period is equal to one divided by the frequency.
- 6
Write the equation linking period and frequency in symbols and give the unit of period.
Model answer
T = 1 / f, with the period T measured in seconds, s.
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