Key term
AQA GCSE Physics 8463
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 contaminationBackground radiationUses of nuclear radiation, and how half-life affects hazardNuclear fission and nuclear fusion
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 GridStatic chargeElectric fields
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 springMoments, levers and gearsPressure at a surface, and the equation p = F over APressure in a column of liquid, upthrust and floatingAtmospheric pressureResolving forces and free body diagramsDistance, 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 quicklyMomentum and its conservationChanges in momentum
Magnetism and Electromagnetism
Topic overviewPoles of a magnetMagnetic fields around a magnetThe compass, and plotting a magnetic fieldElectromagnetismFleming's left-hand rule, motors and loudspeakersInduced potentialThe generator effect, alternators, dynamos and microphonesThe structure of a transformer and the turns ratioTransformer power, and using the transformer equations
Particle Model of Matter
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of wavesSound wavesUltrasound, echo sounding and seismic wavesTypes and uses of electromagnetic wavesRadio waves, and the hazards of ultraviolet, X-rays and gamma raysLensesVisible lightEmission and absorption of infrared radiation, and black bodies
Magnetism and Electromagnetism
The structure of a transformer and the turns ratio
- 3 things to know
- Paper 2
Overview
The primary coil, secondary coil and iron core of a basic transformer, the job of the core and why a steady direct current will not work, the equation linking potential differences to numbers of turns, step-up and step-down transformers with calculations, and the power equation for a transformer that wastes no energy.
What you need to know
Answer each one before you reveal it.
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Key term
Which coil of a transformer is connected to the input supply?
Key term
Which coil of a transformer delivers the output?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What are the three main parts of a basic transformer?
Model answer
A primary coil, a secondary coil, and an iron core that both coils are wound on.
- 2
Which coil of a transformer is connected to the input supply?
Model answer
The primary coil.
- 3
Which coil of a transformer delivers the output?
Model answer
The secondary coil.
- 4
Why is the core of a transformer made of iron?
Model answer
Because iron is easily magnetised.
- 5
Are the two coils of a transformer joined to each other by wire?
Model answer
No, they are linked only by the magnetic field carried in the iron core.
- 6
What is the job of the core in a transformer?
Model answer
To carry the changing magnetic field made by the primary coil across to the secondary coil.
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