Key term
CCEA A-Level Physics 1210
Physical Quantities, Scalars and Vectors
Moments and Equilibrium
Linear Motion and Dynamics
Newton's Laws of Motion
Linear Momentum and Impulse
Work, Energy and Power
Current, Charge and Potential Difference
Resistance and Resistivity
Topic overviewResistance and Ohm's lawOhmic and non-ohmic behaviourResistors in series and in parallelInvestigating current, voltage and resistance in series and parallel circuitsElectrical power and energy in resistive circuitsResistivity and the equation R = ρl/AMeasuring the resistivity of a metalCurrent–voltage characteristics of a conductor, a lamp and a diodeResistance, temperature and superconductivity
Internal Resistance and Potential Dividers
Topic overviewInternal resistance and terminal potential differenceConsequences of internal resistance for external circuitsMeasuring electromotive force and internal resistanceThe potential divider and variable outputPotential dividers in lighting and heating control circuitsLoaded potential dividers and output voltage calculations
Waves
Refraction
Lenses
Superposition, Interference and Diffraction
Topic overviewSuperposition of wavesStanding waves, nodes and antinodesStanding waves on stretched stringsStanding waves in a pipe closed at one endMeasuring the speed of sound with a resonance tubeConditions for observable interferencePath difference and phase differenceYoung's double slitDiffraction at a single slitThe diffraction grating
Quantum Physics
Wave-Particle Duality
Astronomy
Practical Skills and Data Analysis
Topic overviewChoosing and using measuring instrumentsPrecision, accuracy and recording measurementsUsing the cathode ray oscilloscope to measure voltage and frequencyTables, graphs and presenting resultsLinearising a relationship and using the gradientAbsolute and percentage uncertaintyCombining uncertainties and uncertainty on a graphRandom and systematic error, reliability and refining an experiment
Deformation of Solids
Thermal Physics
Topic overviewBoyle's law, Charles's law and the pressure lawThe ideal gas equation pV = nRTThe Avogadro constant, the mole and pV = NkTInternal energy and the distribution of molecular energyThe kinetic theory equation pV = ⅓Nm⟨c²⟩Average molecular kinetic energy and temperatureAbsolute zero and the kelvin scaleSpecific heat capacity and the electrical method
Uniform Circular Motion
Simple Harmonic Motion
Topic overviewDefining simple harmonic motion and a = −ω²xDisplacement, velocity and acceleration: x = A cos ωtThe simple pendulum and T = 2π√(l/g)The loaded spiral spring and T = 2π√(m/k)SHM graphs and finding velocity from a gradientFree vibrations, forced vibrations and resonanceDamping: light, critical and over-damping
The Nucleus and Radioactive Decay
Topic overviewAlpha-particle scattering and the nuclear atomNuclear radius and nucleon numberThe density of nuclear matterAlpha, beta and gamma radiation: nature, penetration and rangeNuclear equations and changes in nucleon and proton numberThe random and exponential nature of radioactive decayActivity, the decay constant and A = −λNExponential decay calculations with A = A₀e^(−λt)Half-life and measuring it
Nuclear Energy, Fission and Fusion
Gravitational Fields
Electric Fields
Capacitors
Magnetic Fields
Charged Particles and Accelerators
Charged Particles and Accelerators
Comparing electric and magnetic deflection
- 3 things to know
- Unit A2 2
Overview
Recall questions on the differences in what each force acts on, its direction relative to the field, and whether it can change the kinetic energy, the parabolic against the circular path, the balance condition v = E/B and why the charge cancels, and which field to use to select a speed and which to separate by charge to mass ratio.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
How do the directions of the electric and magnetic forces on a charged particle relate to the field?
Key term
Which of the electric and magnetic forces can change the kinetic energy of a particle?
Questions from this subtopic
Each one with the model answer underneath.
- 1
State the main difference between the force on a charge in an electric field and in a magnetic field.
Model answer
The electric force acts on a charge whether it is moving or not, while the magnetic force acts only on a moving charge.
- 2
How do the directions of the two forces relate to the field?
Model answer
The electric force is along the field line, while the magnetic force is at right angles to both the field and the velocity.
- 3
Which of the two can change the kinetic energy of a particle?
Model answer
Only the electric force, because the magnetic force is always perpendicular to the motion and does no work.
- 4
What path does a charge follow when fired perpendicular into each field?
Model answer
A parabola in a uniform electric field and a circle in a uniform magnetic field.
- 5
Why is the path in the magnetic field a circle rather than a parabola?
Model answer
The magnetic force turns with the velocity so it always points to the centre, whereas the electric force keeps the same direction throughout.
- 6
Give the two force equations side by side.
Model answer
F = qE for the electric force and F = Bqv for the magnetic force on a charge moving at right angles to the field.
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