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 AAtmospheric pressureDistance, 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
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of 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
Electricity
Current, resistance and potential difference
- 3 things to know
- Paper 1
Overview
What the current through a component depends on, potential difference and resistance, the equation V = IR with its rearrangement, units and calculations, investigating how the resistance of a wire depends on its length, and how adding resistors in series or in parallel changes the total resistance.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
What happens to the current through a component if its resistance rises while the potential difference across it is kept the same?
Key term
State the word equation linking potential difference, current and resistance.
Questions from this subtopic
Each one with the model answer underneath.
- 1
On what two things does the current through a component depend?
Model answer
The potential difference across it and its resistance.
- 2
Two resistors are connected in turn across the same cell. How does the current in the one with the greater resistance compare?
Model answer
It is smaller, because for a given potential difference the greater the resistance the smaller the current.
- 3
What happens to the current through a component if its resistance rises while the potential difference across it is kept the same?
Model answer
The current falls.
- 4
What everyday word means the same as potential difference?
Model answer
Voltage.
- 5
What is meant by the potential difference across a component?
Model answer
It is the voltage across it, the energy transferred by each coulomb of charge that passes through it.
- 6
Which quantity is found by dividing the potential difference across a component by the current through it?
Model answer
Its resistance.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Electricity, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.