This topic includes both circuits which use direct current and mains electricity which is an alternating supply.

Choose your topic:

• Circuit Symbols [FREE] - The symbols you need to remember when drawing and making circuits

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• Electric Current [FREE] - The rate of flow of electrons

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• Potential Difference and Resistance [FREE] - Potential difference is also known as voltage

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• Resistors, Filament Lamps and Diodes [FREE] - Including their characteristics

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• LDRs and Thermistors - Really useful components that can change their resistance

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• Series and Parallel Circuits - How the potential difference and current vary

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• Circuit Examples - Showing how to apply your new knowledge to circuits

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• Building Circuits - Some ideas to help you make sure your electrical circuits always work

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• Alternating Current - This the kind of electrical supply used in homes and industry

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• Electrical Power - The rate of energy transfer and how we calculate this for circuits

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• Energy Transfer in Circuits - The relationship between energy and potential difference

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• The National Grid - How electricity is transferred to our homes

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•  Static Electricity  - How static electricity is generated and introducing electric fields

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