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
Magnetism and Electromagnetism
Magnetic fields around a magnet
- 3 things to know
- Physics Paper 2
Overview
The magnetic field and the magnetic materials iron, steel, cobalt and nickel, why copper is not attracted, the attractive force on magnetic materials, how field strength falls with distance and is greatest at the poles, and the direction of field lines from the north pole and why they never cross.
What you need to know
Answer each one before you reveal it.
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Key term
Name four magnetic materials.
Key term
What kind of force acts between a magnet and a magnetic material such as iron?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a magnetic field?
Model answer
The region around a magnet where a force acts on another magnet or on a magnetic material.
- 2
Name four magnetic materials.
Model answer
Iron, steel, cobalt and nickel.
- 3
A magnet held near a piece of nickel pulls on it without touching it. What does this show about the nickel?
Model answer
It shows that the nickel is inside the magnet's magnetic field.
- 4
Is a copper rod attracted to a magnet? Explain your answer.
Model answer
No, because copper is not a magnetic material, so the magnetic field exerts no force on it.
- 5
What kind of force acts between a magnet and a magnetic material such as iron?
Model answer
The force is always one of attraction.
- 6
Can a bar magnet ever repel an unmagnetised iron nail?
Model answer
No, the force between a magnet and a magnetic material is always attraction.
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