CIE A Level Physics (9702) 2019-2021

Revision Notes

12.1.7 Resistors in Series

Deriving the Equation for Resistors in Series

  • In a series circuit, the combined resistance of two or more resistors is the sum of the individual resistances
  • In a series circuit:
    • The current is the same through all resistors
    • The potential difference is split between all the resistors
  • The equation for combined resistors in series is derived using Kirchhoff’s laws:

Derivation for resistors in series, downloadable AS & A Level Physics revision notes

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

Resistors in series diagram, downloadable AS & A Level Physics revision notes

Resistors connected in series

 

Resistors in series equation, downloadable AS & A Level Physics revision notes

Combined resistance of two or more resistors in series equation

Worked example

Worked example - Resistors in series, downloadable AS & A Level Physics revision notes

Author: Ashika

Ashika graduated with a first-class Physics degree from Manchester University and, having worked as a software engineer, focused on Physics education, creating engaging content to help students across all levels. Now an experienced GCSE and A Level Physics and Maths tutor, Ashika helps to grow and improve our Physics resources.
Close

Join Save My Exams

Download all our Revision Notes as PDFs

Try a Free Sample of our revision notes as a printable PDF.

Join Now
Go to Top