Mains electricity
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Threads
Why this why now
This unit builds on pupils’ prior learning from Circuit components, where they explored the function and behaviour of various electrical components. It deepens their understanding by focusing on Mains electricity, covering how electrical systems operate in homes, safety measures, and energy transmission. As the final unit in the big question, How do electricity and magnetism work?, it reinforces pupils’ understanding of the practical applications of electricity and magnetism in everyday life, linking theoretical concepts to real-world systems.
Prior knowledge requirements
- Current = p.d. / resistance (I=V/R).
- The rules of current and p.d. for a series circuit can be applied to find some missing values of current and p.d.
- The rules of current and p.d. for a series circuit can be applied to find some missing values of current and p.d.
- The equation I=V/R can be rearranged so that either p.d. or R is the subject of the equation.
- If any two values in the equation I=V/R are known, the third can be calculated.
- If only one value in the equation I=V/R is known, rules for current or p.d. need to be applied to find a second.
- Power = work done / time.
- Power is measured in Watt (W).
Threads
Why this why now
This unit builds on pupils’ prior learning from Circuit components, where they explored the function and behaviour of various electrical components. It deepens their understanding by focusing on Mains electricity, covering how electrical systems operate in homes, safety measures, and energy transmission. As the final unit in the big question, How do electricity and magnetism work?, it reinforces pupils’ understanding of the practical applications of electricity and magnetism in everyday life, linking theoretical concepts to real-world systems.
Prior knowledge requirements
- Current = p.d. / resistance (I=V/R).
- The rules of current and p.d. for a series circuit can be applied to find some missing values of current and p.d.
- The rules of current and p.d. for a series circuit can be applied to find some missing values of current and p.d.
- The equation I=V/R can be rearranged so that either p.d. or R is the subject of the equation.
- If any two values in the equation I=V/R are known, the third can be calculated.
- If only one value in the equation I=V/R is known, rules for current or p.d. need to be applied to find a second.
- Power = work done / time.
- Power is measured in Watt (W).
Physics
Mains electricity
This unit covers UK domestic a.c. supply, mains wiring safety, energy changes in electrical systems, power ratings, and energy transfer. It explains the National Grid, transformers, energy sources, and calculations for energy changes and power transmission efficiency.
6 lessons in unit
slide decks, worksheet PDFs, quizzes and lesson overviews. You can select individual lessons from the Mains electricity unit and download the resources you need, or download the entire unit now. See every unit listed in our Edexcel secondary combined science curriculum and discover more of our teaching resources for Edexcel secondary combined science programmes.