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O LevelPhysicsCambridge (CIE)Revision Notes4. Electricity & Magnetism4.3 Electric CircuitsCombined Resistance

Combined Resistance (Cambridge (CIE) O Level Physics) : Revision Note

Leander Oates

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Resistors in Series & Parallel

Resistors in Series

  • When two or more components are connected in series:

    • The combined resistance of the components is equal to the sum of individual resistances

Combined Resistance in Series

combined-resistance, IGCSE & GCSE Physics revision notes

When several components are connected in series, their combined resistance is equal to the sum of their individual resistances

Resistors in Parallel

  • When resistors are connected in parallel, the combined resistance decreases and is less than the resistance of any of the individual components

  • If two resistors of equal resistance are connected in parallel, then the combined resistance will halve

Combined Resistance in Parallel

Equal resistors parallel, IGCSE & GCSE Physics revision notes

The above resistors will have a combined resistance of 2 Ω − half the value of each resistor

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    Leander Oates

    Author: Leander Oates

    Expertise: Senior Physics Content Creator

    Leander graduated with First-class honours in Science and Education from Sheffield Hallam University. She won the prestigious Lord Robert Winston Solomon Lipson Prize in recognition of her dedication to science and teaching excellence. After teaching and tutoring both science and maths students, Leander now brings this passion for helping young people reach their potential to her work at SME.