Deriving the equation for resistors in parallel
- In a parallel circuit, the reciprocal of the combined resistance of two or more resistors is the sum of the reciprocal of the individual resistances
- In a parallel circuit:
- The current is split at the junction (and therefore between resistors)
- The potential difference is the same through all resistors
- The equation for combined resistors in parallel is derived using Kirchhoff’s laws: