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Potential Difference in Circuits

Exam code: 5054
Written by: Ashika|Reviewed by: Caroline Carroll|Updated 2 July 2026

Potential Difference in Series Circuits

Potential Difference in Series Circuits

  • In a series circuit, the sum of potential differences across the components is equal to the total potential difference of the power supply

Potential Difference in a Series Circuit

Voltage in series, IGCSE & GCSE Physics revision notes

In a series circuit the components share the potential difference of the power supply 

Potential Difference in Parallel Circuits

Potential Difference in Parallel Circuits

  • In a parallel circuit:

    • The potential difference across each branch is the same

    • If components are placed in series within a branch, then the potential difference is split across the components within the branch in accordance with the rules of potential difference in series

Lamps connected in a parallel circuit

  • In the above circuit:

    • If the battery is marked 12 V, then the potential difference would be 12 V across each lamp

Potential Difference in Circuits · Revision Notes · Physics · StudyDeck