What is Wheatstone bridge in simple words?

: an electrical bridge consisting of two branches of a parallel circuit joined by a galvanometer and used for determining the value of an unknown resistance in one of the branches.

What is a Wheatstone bridge class 12?

Wheatstone bridge is a special arrangement of resistors as shown in the figure. There are 4 resistances R1,R2,R3and R4 arranged in such a manner thatthere is a galvanometer placed between the points B and D. The arm BD is known as galvanometer arm. If (R1/R2)=(R3/R4), then Bridge is said to be balanced.

What does a Wheatstone bridge do?

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.

How does a Wheatstone bridge circuit work?

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 the unbalanced condition where current flows through the galvanometer.

What is connected between the two ends of Wheatstone bridge?

Explanation: A battery is connected between the two ends of the Wheatstone bridge while a galvanometer is connected between the opposite two ends of the circuit. Ammeter is connected in series with the circuit.

Is Wheatstone bridge AC or DC?

The bridge which is used for measuring the unknown impedance of the circuit is known as the Wheatstone bridge. The DC bridge is used for measuring the unknown resistance of the circuit. The AC bridge uses the AC supply. Wheatstone Bridge and the Kelvin bridge are the types of the DC bridge.

What are the disadvantages of Wheatstone bridge?

Answer: It is very easy to find out the unknown resistance as the rest of the three are easily known. The disadvantage of the Wheatstone bridge is that it is not so precise when it is used to measure large resistances. When the large resistances are to be measured, the results are mostly non-linear.

Why can’t a Kelvin bridge be used for the?

Explanation: A Kelvin bridge can be used for the measurement of high Quality factor values. Due to bridge imbalance problem, Kelvin bridge can’t be used for measuring low Quality factor values.

What is the use of Maxwell Bridge?

A Maxwell bridge is a modification to a Wheatstone bridge used to measure an unknown inductance (usually of low Q value) in terms of calibrated resistance and inductance or resistance and capacitance. When the calibrated components are a parallel resistor and capacitor, the bridge is known as a Maxwell-Wien bridge.

What is the principle of de sauty bridge?

De-Sauty bridge is used to measure the capacitance. And the bridge balance is obtained when both the capacitors are perfect.

What are the advantages of Kelvin Double bridge?

Advantages. It can measure the resistance value in the range of 0.1 µA to 1.0 A. Sensitivity is high.

What is Wheatstone bridge and its applications?

Wheatstone bridge applications are used to sense electrical and mechanical quantities . But, the simple Wheatstone bridge application is light measurement using photoresistive device. In the Wheatstone bridge circuit, a light dependent resistor is placed in the place of one of the resistors.

What are the advantages of Wheatstone bridge?

• The main advantage of the Wheatstone bridge is that it can be easily interfaced into various combinations . • The Wheatstone bridge is traditionally called ohmmeter as the results are measured in terms of resistance and also are accurate and precise.

What is Wheatstone bridge and other strain gauges circuits?

The Wheatstone Bridge Circuit is used in the field of strain gauge measurements to show a nonlinear behaviour between resistance change and output voltage.

Where is the Wheatstone bridge used?

Wheatstone bridge is widely used for measuring small resistances and therefore it is used in applications such as strain gauges and resistance thermometer . Mostly a part of electrical measurement circuits, wheatstone bridge is an integral part of low temperature alarms.