For AQA GCSE Physics (and as an intro to AQA A level Physics). Describes the parts of an alternator. Explains how the p.d. is induced in the coil. Describes the slip ring commutator. Step by step diagrams and explanations for each stage of rotation and the corresponding p.d. output. Explains the shape of the p.d. versus time graph. Explains why output p.d. is AC. Gives key facts to learn for the alternator.

For GCSE AQA Physics (and as an introduction to AQA A-level Physics) Parts of DC motor Explains why forces occur on the coil Step by step explanation of the forces occurring on the coil at each position Explains purpose of split ring commutator Key points to learn for DC motor

PowerPoint on lenses and ray diagrams. Includes 3 student practicals on lenses. Ray diagrams for concave and convex lenses. Method to draw lens ray diagrams. Ray diagrams for convex and concave lenses (teacher/student adds the construction rays). Table of image properties for convex lenses at different distances and for a concave lens.

Describes the parts of a DC dynamo. Explains how a p.d. is induced in the coil. Describes the split ring commutator. Describes the p.d. versus time graph. Step by step diagrams and explanations for the p.d. output for every stage in a rotation of the coil. List of key facts to learn about the DC dynamo.

Describes what visible light is. Shows dispersion of white light. Mixing of primary colours. Explains why coloured objects appear the colour they are. Experiment looking at coloured objects through coloured filters. **Explains the colour we see when viewing objects through colour filters **. Lots of student questions on colour.

PowerPoint Presentation including: definition of specific heat capacity, what it means, formula, calculations, required practical worksheet, explanation questions and answers, definition of specific latent heat, what it means, formula, calculations, experiment to find latent heat of fusion of water, experiment to find latent heat of vapourisation of water.

Pair production and annihilation Definitions of rest mass and rest energy Converting between rest mass and rest energy Annihilation: a particle and its antiparticles collide, annihilate and form 2 photons Annihilation energy calculations + answers Pair production: one photon produces a particle and its antiparticle Pair production energy calculations + answers

For GCSE AQA Physics and as an introduction to A level Transformers Parts of a transformer How a voltage is induced in the secondary Transformer formulas Questions for students on each formula Use of transformers in the National Grid

GPE formula plus examples KE formula plus examples Changes between KE and GPE plus examples Falling objects GPE to KE Rising objects KE to GPE Practical: Investigation of energy changes of a trolley down a ramp Energy changes in braking – KE to work done against friction plus examples EPE formula plus examples Spring formula F=ke plus examples Required practical: Adding force to a spring