What is Wheatstone bridge used for?

A Wheatstone bridge is a divided bridge circuit used for the measurement of static or dynamic electrical resistance. The output voltage of the Wheatstone bridge circuit is expressed in millivolts output per volt input. The Wheatstone circuit is also well suited for temperature compensation.

What is the Wheatstone bridge principle?

What is the Wheatstone Bridge Principle? The Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances are equal and no current flows through the circuit. Under normal conditions, the bridge is in an unbalanced condition where current flows through the galvanometer.

Why is Wheatstone bridge so called?

Wheatstone bridge is an electric circuit and as the name suggests, it is in a shape of a bridge, the bridge is a galvanometer. It is named after Sir Charles Wheatstone who has popularized this. Wheatstone bridge helps in finding the unknown resistance value of a resistor. This bridge is also called post office box.

What is Wheatstone bridge class 12?

The Wheatstone bridge principle states that if four resistances P, Q, R, and S are arranged to form a bridge with a cell and key between A and C, and a galvanometer between B and D then the bridge is said to be balanced when the galvanometer shows a zero deflection.

Is Wheatstone bridge AC or dc?

Wheatstone’s bridge is a simple DC bridge, which is mainly having four arms. These four arms form a rhombus or square shape and each arm consists of one resistor. To find the value of unknown resistance, we need the galvanometer and DC voltage source.

Who invented Wheatstone bridge?

Samuel Hunter ChristieWheatstone bridge / Inventor

Is Wheatstone bridge AC or DC?

What is sensitivity of Wheatstone bridge?

The sensitivity of a Wheatstone bridge is defined as the deflection in the galvanometer per unit current. In the unbalanced condition of the bridge, when current flows, it causes the pointer of galvanometer to get deflected. Thus, the deflection rate is the function of sensitivity.

Which current is used in Wheatstone bridge?

Why is Wien bridge used?

Wien’s bridge is used for precision measurement of capacitance in terms of resistance and frequency. It was also used to measure audio frequencies.

What is the meaning of Wheatstone?

[ n ] a bridge used to measure resistances.

What is unit of sensitivity?

Unit of instrument sensitivity is expressed in Ohm/Volt. Sensitivity is also expressed as: S e n s i t i v i t y = 1 a m p e r e. So, sensitivity is said to be equal to the reciprocal of the full-scale deflection current.