Key term
Edexcel GCSE Combined Science Physics 1SC0
Key Concepts of Physics
Motion and Forces
Topic overviewScalar and vector quantitiesExamples of vectors and scalars, and velocitySpeed, distance, time and distance-time graphsAcceleration and the equation v squared minus u squaredVelocity-time graphs and free fallMeasuring speed in the laboratory, and typical everyday speedsNewton's first law, and investigating force, mass and accelerationNewton's second and third lawsWeight, mass and gravitational field strengthCircular motion and centripetal forceInertial mass and momentumCollisions, and force as the rate of change of momentumReaction time, stopping distance and large decelerationsFactors affecting stopping distance and reaction time
Conservation of Energy
Waves
Light and the Electromagnetic Spectrum
Topic overviewProperties of electromagnetic wavesInvestigating refraction in glass blocksThe groups of the electromagnetic spectrumThe continuous spectrum, and what our eyes can detectAbsorption, transmission and the velocity of electromagnetic wavesHow radiation is generated, and why danger rises with frequencyHarmful effects of excessive exposure to radiationUses of electromagnetic radiation
Radioactivity
Topic overviewThe atom and the size of atomsIsotopes, atomic number and mass numberRelative masses and charges of subatomic particlesElectron orbits and energy levelsForming ions, and how the atomic model changedTypes of ionising radiationBackground radiation and detecting radioactivityAlpha, beta and gamma, and their penetrating powerBeta-minus and beta-plus decayEffects of decay on atomic number and mass numberBalancing nuclear equationsActivity and the becquerelHalf-life and the randomness of decayHalf-life calculationsThe dangers of ionising radiationSafety precautions, contamination and irradiation
Energy – Forces Doing Work
Topic overviewEnergy stores and energy transfer diagramsChanging a system's energy, and measuring work doneWork done and the energy changes it causesGravitational potential and kinetic energy calculationsDissipation and wasted energyPower as the rate of energy transferThe watt, and calculating efficiency
Forces and Their Effects
Electricity and Circuits
Topic overviewThe atom, and drawing circuit diagramsSeries and parallel circuitsPotential difference and the voltmeterEnergy transferred by moving chargeCurrent, charge and measuring currentResistance and the equation V = IRResistors in series and in parallelDesigning circuits to test componentsInvestigating resistance in circuitsCurrent-potential difference graphs for componentsLight-dependent resistors and thermistorsThe heating effect of an electric currentUses of the heating effect, and the equation E = IVtPower as energy transferred per secondCalculating electrical powerEnergy transfer in domestic devices, and power ratingsDirect and alternating currentAlternating current and the UK mains supplyLive and neutral wires, earthing and fusesFuses in the live wire, mains voltages and electrical dangers
Magnetism and the Motor Effect
Topic overviewMagnetic poles, permanent and induced magnetsUses of magnetic materialsThe magnetic field around a bar magnetPlotting compasses and the Earth's magnetic fieldThe magnetic effect of an electric currentSolenoids and electromagnetsThe motor effect and Fleming's left-hand ruleThe force on a conductor in a magnetic field
Electromagnetic Induction
Particle Model
Topic overviewKinetic theory and differences in densityCalculating density, and investigating itChanges of state and internal energySpecific heat capacitySpecific latent heat and thermal insulationInvestigating the specific heat capacity of waterGas pressure and the motion of particlesAbsolute zero and the kelvin scale
Electromagnetic Induction
Factors affecting an induced potential difference
- 3 things to know
- Paper 6
Overview
The speed, magnet strength and number of turns that set the induced potential difference, reversing the movement or the pole, and why the induced field opposes the change that made it.
What you need to know
Answer each one before you reveal it.
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Key term
State three factors that affect the size of the potential difference induced when a magnet is moved into a coil.
Key term
Describe what happens to the induced potential difference when a magnet is pushed into a coil more quickly.
Questions from this subtopic
Each one with the model answer underneath.
- 1
State three factors that affect the size of the potential difference induced when a magnet is moved into a coil.
Model answer
The speed of the movement, the strength of the magnet, and the number of turns on the coil.
- 2
Describe what happens to the induced potential difference when a magnet is pushed into a coil more quickly.
Model answer
The induced potential difference is larger.
- 3
Describe how the direction of the induced current changes when a magnet is pulled out of a coil instead of pushed into it.
Model answer
The induced current flows in the opposite direction.
- 4
State the effect on the induced potential difference of turning a magnet round so that the other pole enters the coil first.
Model answer
The induced potential difference is reversed.
- 5
Describe the magnetic field produced by the current induced in a coil.
Model answer
It always acts to oppose the change in magnetic field that induced it.
- 6
Explain why a force must be applied to push a magnet into a coil that is part of a complete circuit.
Model answer
The induced current makes a magnetic field that repels the approaching magnet, so it must be pushed against that field.
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