Wheatstone Bridge

Four arm bridge circuit used to measure resistance, inductance or capacitance.

A network of four resistances, an emf source, and an indicator connected such that when the four resistances are matched, the indicator will show a zero deflection or "null" reading.

The Wheatstone Bridge forms the prototype of most other bridge circuits.

Historical Notes

  1. 1833 Samuel Hunter Christie first describes the Wheatstone Bridge in his paper "Experimental Determination of the Laws of Magneto-electric Induction".
  2. 1843 Sir Charles Wheatstone received credit for its invention because of his adaptation of the circuit in 1843 for the measurement of resistance.

See also: Bridge Rectifier, Capacitance, Inductance, Resistance.

Previous PageView links to and from this pageNext Page

Subjects: Electronics