BRAINCAKE

OCR GCSE Physics

OCR Physics A (J249)8 topics182 lessons

OCR GCSE Physics revision for OCR Physics A (J249): 8 topics and 182 short lessons, each with R.E.C.I.P.E. recall steps and a quiz. The topics follow the OCR specification.

Subscribe

1. Matter

22 lessons

  1. How the atomic model has changed
  2. The structure of the atom
  3. The size of atoms and small molecules
  4. Density
  5. Density and the states of matter
  6. Density, mass and volume when mass is conserved
  7. Conservation of mass in changes of state
  8. Physical changes and chemical changes
  9. Heating, internal energy and changes of state
  10. Specific heat capacity and specific latent heat
  11. Calculating energy changes using specific heat capacity
  12. Calculating energy changes using specific latent heat
  13. Molecules, temperature and pressure of a gas
  14. Gas temperature and pressure at constant volume
  15. Compressing gases and the force from pressure
  16. Volume and pressure of a gas at constant temperature
  17. Doing work on a gas to raise its temperature
  18. A simple model of the atmosphere and atmospheric pressure
  19. Atmospheric pressure and height
  20. Floating and sinking
  21. Pressure in liquids and upthrust
  22. Calculating pressure differences in liquids

2. Forces

40 lessons

  1. Measuring distance and time
  2. Calculating speed from distance and time
  3. Converting units and calculating rates
  4. Vectors and scalars: distance, displacement, speed and velocity
  5. Interpreting distance-time and velocity-time graphs
  6. Area under a velocity-time graph
  7. Average speed for non-uniform motion
  8. Speed, distance and uniform acceleration
  9. Ways objects interact
  10. Interactions between pairs of objects
  11. Forces as vectors and free body diagrams
  12. Newton's first law
  13. Vector diagrams, resultant force and equilibrium
  14. Forces on an isolated object and terminal velocity
  15. Free body diagrams and resultant forces
  16. Balanced forces
  17. Newton's second law calculations
  18. Inertia and inertial mass
  19. Momentum and collisions
  20. Force, mass, velocity and acceleration
  21. Work done by a force
  22. Stored energy and energy transfers
  23. Power as the rate of energy transfer
  24. Newton's third law
  25. Circular motion and changing velocity
  26. Forces needed to stretch, bend or compress
  27. Elastic and plastic deformation
  28. Force and extension for a spring
  29. Linear and non-linear force-extension relationships
  30. Calculating the spring constant
  31. Work done in stretching a spring
  32. Gravitational fields
  33. Weight and mass
  34. Acceleration in free fall
  35. Using W = m g
  36. Forces causing rotation
  37. Moments and balance
  38. Levers and gears
  39. Fluid pressure and force
  40. Pressure, force and area, and hydraulics

3. Electricity

20 lessons

  1. Charge as a property of matter
  2. Static electricity and sparking
  3. Electron transfer and static electricity
  4. Electric fields
  5. Current and the conditions for charge flow
  6. Current in a single closed loop
  7. Charge, current and time
  8. Series and parallel circuits
  9. Circuit diagrams and symbols
  10. Current, potential difference and resistance
  11. The equation V = I R
  12. Why resistance can change
  13. Circuits to explore resistance
  14. Linear and non-linear circuit elements
  15. I-V graphs of wires, lamps, diodes and sensors
  16. Resistors in series and in parallel
  17. Calculating in series and parallel circuits
  18. Using circuits to measure and test
  19. Power, p.d., current and energy
  20. Circuit calculations: charge, resistance, power and energy

4. Magnetism and magnetic fields

17 lessons

  1. Attraction and repulsion between magnets
  2. Permanent and induced magnets
  3. Magnetic fields and field lines
  4. The Earth's magnetic field and compasses
  5. Magnetic fields around a current-carrying wire
  6. Strength of the field around a conductor
  7. Solenoids and the magnetic effect
  8. The force between a magnet and a current-carrying conductor
  9. Fleming's left-hand rule
  10. Calculating the force on a conductor
  11. Electric motors
  12. Induced potential difference
  13. Alternators and dynamos
  14. How a transformer works
  15. Turns ratio and potential difference in a transformer
  16. Transformer calculations
  17. Microphones, loudspeakers and headphones

5. Waves in matter

26 lessons

  1. Wave motion: amplitude, wavelength, frequency and period
  2. Wavelength and frequency
  3. The wave speed equation
  4. Calculations with wave speed, frequency and wavelength
  5. Transverse and longitudinal waves
  6. Waves changing medium: speed, frequency and wavelength
  7. Reflection, transmission and absorption of waves
  8. Sound waves and vibrations in solids
  9. Limits of hearing and hearing changes with age
  10. Transverse and longitudinal waves and measuring wave speed
  11. Evidence that the wave travels, not the medium
  12. Electromagnetic waves are transverse and travel through space
  13. Energy transfer by electromagnetic waves
  14. Frequency and wavelength across the spectrum
  15. The groups of the electromagnetic spectrum
  16. What our eyes can detect
  17. Light is an electromagnetic wave
  18. Uses of electromagnetic waves
  19. Hazards of ultraviolet, X-rays and gamma rays
  20. Using waves to see inside the body
  21. Radio waves and electrical circuits
  22. How substances interact with electromagnetic waves
  23. Wave speed and refraction
  24. Reflection, refraction and lenses in ray diagrams
  25. Constructing ray diagrams for reflection and refraction
  26. Colour, absorption, transmission and reflection

6. Radioactivity

17 lessons

  1. Protons and neutrons in the nucleus
  2. Isotopes and nuclear mass
  3. Nuclear symbols and isotopes
  4. Unstable nuclei and types of radiation
  5. How emissions change the nucleus
  6. Writing nuclear decay equations
  7. Balancing nuclear equations
  8. Electron energy levels and ionisation
  9. Radiation from atoms and nuclei
  10. Half-life and random decay
  11. Net decline over a number of half-lives
  12. Penetrating power of alpha, beta and gamma
  13. Contamination and irradiation
  14. Half-life and the hazard of radioactive material
  15. Medical uses of radiation
  16. Nuclear fission
  17. Nuclear fusion

7. Energy

12 lessons

  1. Conservation of energy in a closed system
  2. Changes in energy stores in common situations
  3. Energy changes by heating and by work done
  4. Calculating energy changes on a common scale
  5. Kinetic, gravitational potential and elastic energy
  6. Energy dissipation
  7. Energy in domestic devices
  8. Power ratings of appliances
  9. Calculating efficiency
  10. Increasing efficiency
  11. Reducing unwanted energy transfer
  12. Rate of cooling of a building

8. Global challenges

28 lessons

  1. Typical speeds in everyday life
  2. Estimating everyday accelerations
  3. Converting units and calculating rates
  4. Measuring human reaction times
  5. Stopping distances and road safety
  6. Stopping distance and speed
  7. The dangers of large decelerations
  8. Estimating forces on a public road
  9. Estimating speeds, accelerations and forces in road transport
  10. Energy sources on Earth
  11. Trends in energy resource use
  12. The national grid
  13. Step-up and step-down transformers
  14. Why the grid is efficient
  15. Transformers and power transfer
  16. Domestic mains supply in the UK
  17. Direct and alternating potential difference
  18. Live, neutral and earth wires
  19. Dangers of the live wire and earth connections
  20. Red-shift and the expanding universe
  21. Red-shift, CMBR and the Big Bang
  22. Formation of the Sun and stability of stars
  23. Thermal radiation from all bodies
  24. The Solar System and satellites
  25. Circular orbits: speed and velocity
  26. Orbital speed and radius
  27. Temperature and radiation balance
  28. Waves exploring hidden structures