Circuit loops

- Modelling simple circuits(Introduction)
- Calculating the current in whole circuit loops(Exposition)
- Why 230 volt is a safe limit(Exposition)
- Alternating current(Exposition)
- Resistance(Exposition)
- Using a constraining relationship(Exposition)
- Potential difference(Exposition)
- Energy – snapshot to snapshot(Teaching tip)
- Adding resistance in a single loop(Exposition)
- Providing more routes(Exposition)
- Loops in parallel circuits(Exposition)
- Fuses and earthing for safety(Exposition)
- Physics is not putting numbers into memorised equations(Teaching tip)
- The uses of algebra(Expansion – lead me deeper)
- Energy in series and parallel connections(Exposition)
- Loop models of simple circuits(Summary)

Electrical working

- Electrical working(Exposition)
- Pathways and compensation(Exposition)
- Care with phrases(Teaching tip)
- The magic of units(Expansion – lead me deeper)
- Electrical working in series circuits(Exposition)
- A second look at the reasons for a 230 volt supply(Exposition)
- Electrical working in parallel circuits(Exposition)
- A solver's toolkit(Exposition)
- What to do about all that algebra(Teaching tip)
- Electricity at work(Summary)

Energy calculations

- Getting cars going(Introduction)
- Devices in general(Exposition)
- Things that glow(Exposition)
- Making a difference(Exposition)
- Things that warm(Exposition)
- Things that speed up and slow down(Exposition)
- Mechanisms of accelerating(Exposition)
- Field lines used to predict forces(Exposition)
- Transformers – changing back to where you started(Exposition)
- Why so many transformers?(Exposition)
- How the transformer works(Expansion – lead me deeper)
- Transformer input and output(Expansion – lead me deeper)
- Generators(Exposition)
- Devices at work(Summary)

Efficiency

- Energy stores accumulate working(Introduction)
- Using a motor to lift(Exposition)
- Warming an iron(Exposition)
- Battery-accelerated car(Exposition)
- Differing accumulation(Exposition)
- Calculating energy efficiencies(Exposition)
- Quantifying pathways(Exposition)
- Cells revisited(Expansion – tell me more)
- Some efficiencies(Exposition)
- Using efficiencies(Summary)

Pressing numbers on the keyboard whilst the diagram has focus (click on it) will select parts. 0 will show the whole diagram again.

Pressing numbers on the keyboard whilst the diagram has focus (click on it) will select parts. 0 will show the whole diagram again.

Using the popular right lines / wrong track format from Supporting Physics Teaching.