✔ Wheatstone Bridge How It Works

Wheatstone Bridge How It Works

- June 30, 2018

Do you know how does a wheatstone bridge work. The general arrangement of wheatstone bridge circuit is shown in the figure below.

Wheatstone Bridge

Solved Potentiometer And Wheatstone Bridge Circuit In A F

Gs 470 Wheatstone Bridge

Wheatstone bridge wheatstone bridge and its working.

Wheatstone bridge how it works. The wheatstone bridge was originally developed by charles wheatstone to measure unknown resistance values and as a means of calibrating measuring instruments voltmeters ammeters etc by the use of a long resistive slide wire. This circuit is built with two known resistors one unknown resistor and one variable resistor connected in the form of bridge. Wheatstone bridge is a device which is used to measure the electrical resistance by comparison method.

Among these resistances p and q are known fixed electrical resistances and these two arms are referred as ratio arms. When the variable resistor is adjusted then the current in the galvanometer becomes zero the ratio of two two unknown resistors is equal to the ratio of value of unknown resistance and adjusted value of variable resistance. Basically an electrical circuit wheatstone bridge is used to measure resistance of an unknown resistor by passing current through it.

It is a four arms bridge circuit where arm ab bc cd and ad are consisting of electrical resistances p q s and r respectively. Either one two or all four. A wheatstone bridge is widely used to measure the electrical resistance.

The figures and charts for this article were created using ltspice a free program available from analog devices adi. The primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast with something like a simple voltage divider. Pictured is a wheatstone bridge with a strain gauge as r4.

If not just find out. 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 wheatstone bridge is a tool that should be in every rf engineers toolbox and in many cases it might be the ideal solution for a measurement circuit.

Although today digital multimeters provide the simplest way to measure a resistance. Stretching a strain gauge causes a change in its resistance hence a strain gauge is a variable resistor.