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
Electric Fields
Uniform fields between parallel plates
- 3 things to know
- Unit A2 2
Overview
Recall questions on how a uniform field is produced and what uniform means, the field-line pattern, E = V/d with worked calculations, the force on an electron between the plates, the effect of halving the separation, fringe distortion at the edges, the work done moving a charge across, and why that work is path-independent.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
What is meant by saying the field between parallel plates is uniform?
Key term
How are the field lines drawn between parallel plates?
Questions from this subtopic
Each one with the model answer underneath.
- 1
How is a uniform electric field produced?
Model answer
By applying a potential difference between two parallel conducting plates that are close together compared with their size.
- 2
What is meant by saying the field between parallel plates is uniform?
Model answer
The field strength has the same magnitude and direction at every point between the plates, except near the edges.
- 3
How are the field lines drawn between parallel plates?
Model answer
As straight parallel lines equally spaced, running from the positive plate to the negative plate at right angles to both.
- 4
Give the equation for the field strength between parallel plates and define each symbol.
Model answer
E = V/d, where E is the field strength in V m⁻¹, V the potential difference between the plates in volts and d their separation in metres.
- 5
Calculate the field strength between plates 5.0 mm apart with 2000 V across them.
Model answer
E = V/d = 2000 ÷ 5.0 × 10⁻³, which is 4.0 × 10⁵ V m⁻¹.
- 6
Calculate the force on an electron in that field.
Model answer
F = qE = 1.60 × 10⁻¹⁹ × 4.0 × 10⁵, which is 6.4 × 10⁻¹⁴ N, directed towards the positive plate.
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