![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Wheatstonebridge.svg/640px-Wheatstonebridge.svg.png&w=640&q=50)
Wheatstone bridge
Electric circuit used to measure electrical resistance / From Wikipedia, the free encyclopedia
A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider).[1] Its operation is similar to the original potentiometer.
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![A Wheatstone bridge has four resistors forming the sides of a diamond shape. A battery is connected across one pair of opposite corners, and a galvanometer across the other pair.](http://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Wheatstonebridge.svg/320px-Wheatstonebridge.svg.png)
The Wheatstone bridge was invented by Samuel Hunter Christie (sometimes spelled "Christy") in 1833 and improved and popularized by Sir Charles Wheatstone in 1843.[2] One of the Wheatstone bridge's initial uses was for soil analysis and comparison.[3]