Revision Notes

4.3.1 Circuit Diagrams

Standard Circuit Symbols

  • The diagram below shows the various circuit symbols that could be used in circuit diagrams. You will be expected to know what each one is

Circuit symbols, IGCSE & GCSE Physics revision notes

You are expected to be able to recognise and draw the above symbols


Extended Only

Diode Circuit Symbol

  • In addition to the above, you should be able to recognise and draw the circuit symbol for a diode:


Diode symbol, IGCSE & GCSE Physics revision notes

A diode is a component that only allows a current in one direction

(Note: diodes are occasionally drawn with a horizontal line running through the middle of them)


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Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.

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