Explain Wheatstone Bridge ?
Answers
Explanation:
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.
Wheatstone bridge along with operational amplifier is used to measure the physical parameters like temperature, strain, light, etc.
The main advantage of the Wheatstone bridge is that it can be easily interfaced into various combinations.
Explanation:
Wheatstone bridge, also known as the resistance bridge, is used to calculate the unknown resistance by balancing two legs of the bridge circuit, of which one leg includes the component of unknown resistance. It was invented by Samuel Hunter Christie in the year 1833, which was later popularized by Sir Charles Wheatstone in 1843.
The circuit is composed of two known resistors, one unknown resistor and one variable resistor connected in the form of a bridge. This bridge is very reliable as it gives accurate measurements.Following is the formula used for Wheatstone bridge:
R=PSQ
Where,
R is the unknown resistance
S is the standard arm of the bridge
P and Q is the ratio of arm of bridge