Electricity production, transmission and use
Below is an outline of the video lessons available on electricity production, transmission and use, a total length of over 50 minutes. A section of the second video on domestic mains electricity, is given as an example at the bottom of the page.
Electricity Generation and energy resources 29m (In GCSE, 14 to 16 years, collection also suitable for A level introduction)
The lesson begins with an explanation of the difference between renewable and non-renewable energy resources and explains some of the criteria upon which markets and governments make decisions on which resources to use.
These criteria are applies to a succinct explanation of the processes, advantages and disadvantages of almost all the commonly used resources available.
Domestic mains electricity, fuses and earthing 12m (In GCSE, 14 to 16 years, collection also suitable for A level introduction)
Based upon the UK 240 volt 3 pin plug system the video lesson explains how a plug is wired, what the live neutral and earth do, why AC is essential rather than DC, how a fuse works and how a trip switch works.
In four parts:
· What transformers are and the way they work in terms of electromagnetic induction using demonstrations, diagrams and explanations.
· The structure of a transformer and the calculation of voltage change.
· An explanation of the laminated core including an explanation of eddy currents with a demonstration.
· The use of transformers in power distribution including a worked example of comparative power loss.