# OCR

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The PowerPoint slideshows on this page are for the 2015 OCR A Level Physics syllabus and the entire syllabus is covered by these slideshows (there is no PowerPoint for Module 1 as this is based through practical work).

If you are looking for the *IB Physics* course instead then please click here

If you are looking for *EdExcel A Level Physics*, please click here

## Powerpoints for the following units:

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## Physics:

## Module 2 - Foundations of Physics

This slideshow covers the following content from the OCR A Level course: estimations, SI units, derived units, homogeneity, standard form and prefixes, graphs and tables of results, zero errors, systematic errors, random errors, precision, true values, accuracy, measurement error, percentage difference, uncertainty, compounding uncertainties, error bars, error boxes, uncertainties in gradients, vector and scalar quantities, resolving vectors.

## Module 3 - Forces and Motion

This 155-slide PowerPoint covers the entirety of the Forces and Motion module from the OCR A Level course. In includes: speed calculations, acceleration and how to calculate it, graphs of motion (distance-time graphs and velocity-time graphs), vector and scalar quantities, how velocity is different to speed, instantaneous speed, graphs of motion for a bouncing ball, questions on drawing graphs of motion, SUVAT equations, vertical projection, measuring the acceleration due to freefall, stopping distances, projectile motion in two dimensions, types of force, Newton's Laws of Motion, weight and mass, gravitational fields, free body force diagrams, terminal velocity in gases and fluids, the principle of moments, calculating turning moments, torques and couples, rotational forces, centre of mass, non-perpendicular forces, density, pressure, how pressure varies with depth, upthrust in fluids, work done, the principle of the conservation of energy, calculating kinetic and gravitational potential energy, deriving equations for gravitational and kinetic energy, power, efficiency, force-extension in springs, the spring constant, force-extension graphs for wire and rubber, elastic limit, limit of proportionality, elastic potential energy, elastic strain energy, stress and strain, the Young Modulus, stress-strain graphs for wires and rubber, momentum, the principle of the conservation of momentum, impulse, force-time graphs, conservation of momentum in two dimensions, energy loss in collisions, work done in explosions.

## Module 4 - Electrons, Waves and Photons

This PowerPoint covers the entirety of module 4 from the OCR 2015 A Level Physics course, including: electric current and how conventional current is different, calculating charge, current in wires and electrolysis, what happens to current and voltage in series and parallel, Kirchoff's Laws, carrier density, drift speed, comparing drift speeds in wires of different thicknesses, circuit symbols, work done, the definition of EMF, accelerating electrons, calculating resistance, Ohm's Law, current-voltage graphs for bulbs, resistors, diodes and LEDs, characteristics of thermistors and LDRs, using thermistors and LDRs in circuits, resistivity and how to determine it practically, power, the cost of electricity, KWh, resistors in series and parallel, Kirchoff's laws applied to circuits with more than one EMF, internal resistance, determining EMF and internal resistance, potential dividers, potentiometers, definitions of terms such as amplitude, frequency and longitudinal/transverse waves, the wave equation, phase difference, using oscilloscopes, reflection, refraction, diffraction, intensity of a wave, the electromagnetic spectrum, polarisation, Snell's Law, critical angle, coherence, superposition, path difference, Young's Double Slit experiment, standing waves, harmonics, particle theory vs wave theory, photons, using LEDs to determine the Plank Constant, photoelectric emission, calculating photon energy, wave-particle duality, electron diffraction.

## Module 5 - Newtonian World and Astrophysics

This PowerPoint covers module 5 of the 2015 A Level (OCR) course, including: thermal equilibrium, absolute temperature, particle theory, Brownian motion, internal energy, energy changes when heating ice, specific heat capacity, specific latent heat, latent heat of fusion, moles and molecules, assumptions of kinetic theory, gas pressure, pressure and volume in gases, Boyle's Law, pressure and temperature in gases, the definition of "absolute zero", the Ideal Gas Equation, RMS speed, molecular speed and temperature, radians, circular motion, centripetal acceleration, phase difference, simple harmonic motion, graphs of SHM, calculating displacement, velocity and acceleration in SHM, maximum values for SHM, isochronous oscillations, energy changes in SHM, damping, resonance, amplitude-driving frequency graphs, the Earth's gravitational field, Newton's Laws of Gravitation, the inverse square law, gravitational field strength, equating gravitational force to centripetal force, Kepler's Laws, geostationary orbits, gravitational potential, force-distance graphs for gravity and gravitational potential, escape velocity, our solar system, planetary satellites, comets, the life cycle of a star (including protostars, main sequence, red giants, white dwarves, supernovae, neutron stars and black holes), Hertzsprung-Russel diagrams, spectra, emission and absorption spectra, intensity vs wavelength, colour vs temperature, Wien's Displacement Law, luminosity, the sun's luminosity, the light year, intensity, distances in space, stellar parallax, parsecs, the Cosmological Principle, the Big Bang Theory, red shift, Hubble's Law, the Hubble Constant and using it to determine the age of the universe, CMBR, evolution of the universe, dark energy and dark matter.

## Module 6 - Particle and Medical Physics

This PowerPoint covers the final module in the OCR 2015 A Level course, including: capacitors, capacitance and its definition, charging and discharging a capacitor, current-time graphs for discharging, capacitors in series and parallel, energy stored in a capacitor, time constant, exponential decay in capacitors, fundamental forces, electric field around a point charge, Coulomb's Law, electric field strength for a point charge, uniform electric fields between two plates, demonstrating electric fields, potential gradient, electric fields in a capacitor, dielectrics, electric potential, force-distance graph for point charges, electric potential energy, magnetic fields around bar magnets, wires and coils, Fleming's Left Hand Rule, the motor effect, magnetic force on a wire, charged particles in magnetic fields, velocity selectors, electromagnetic induction, flux and flux linkage, Faraday's Law, Lenz's Law, AC generators, transformers, the transformer equation, power in a transformer, the structure of the atom, Rutherford Scattering, nuclear and atomic densities, the unified atomic mass unit, isotopes, the strong nuclear force, nuclear radius, fundamental particles, quarks and antiquarks, leptons and antileptons, baryons and mesons, conserving mass and charge, beta decay in terms of quarks, types of ionising radiation, radioactive decay, half life, carbon dating, energy-mass equivalence, nuclear fusion and fission and calculating the energy released, pair production and pair annihilation, binding energy, binding energy per nucleon, fission in power stations, disposing of radioactive waste, producing X-rays, characteristic radiation, Bremsstrahlung/braking radiation, attenuation, simple scatter, photoelectric effect in X-rays, Compton scattering, pair production in X-rays, attenuation coefficient, contrast media, CAT scanners and how they work, CAT scanners vs X-rays, tracers, gamma cameras, pair annihilation, PET scans and how they are done, advantages and disadvantages of PET scans, definition of ultrasound, the piezoelectric effect, transducers, A scans vs B scans, acoustic impedance, reflecting ultrasound, Doppler Effect in ultrasound.