Resistors in Series (CIE A Level Physics)

• 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:

• When two or more components are connected in series:
  • The combined resistance of the components is equal to the sum of individual resistances

Resistors connected in series

Combined resistance of two or more resistors in series equation