bridge, in electrical measurement, instrument for measuring electrical quantities.A bridge can measure other quantities in addition to resistance, depending upon the type of circuit elements used in the arms.
What is bridge in measurement?
Advertisements. If the electrical components are arranged in the form a bridge or ring structure, then that electrical circuit is called a bridge. In general, bridge forms a loop with a set of four arms or branches. Each branch may contain one or two electrical components.
What is bridge circuit explain?
A bridge circuit is a topology of electrical circuitry in which two circuit branches (usually in parallel with each other) are “bridged” by a third branch connected between the first two branches at some intermediate point along them.
What are the types of bridge circuits?
Different types of bridge circuits include Wheatstone, Wien, Maxwell, H-bridge, Fontana, Diode, Kelvin and Carey Foster. A Wheatstone bridge circuit is mainlyused to calculate an unknown electrical resistance by balancing two legs of a circuit; one leg of the circuit comprises an unknown component.
What is the principle of operation of bridge?
It works on the principle of null deflection, which means the ratio of their resistances are equal and hence no current flows through the circuit. Under normal conditions, the bridge will be in the unbalanced condition where current flows through the galvanometer.
What is difference between AC and DC bridge?
The AC and DC bridge both are used for measuring the unknown parameter of the circuit. The AC bridge measures the unknown impedance of the circuit. The DC bridge measures the unknown resistance of the circuit.
Why is Wheatstone bridge used?
Wheatstone Bridge is used in applications where small changes in resistance are to be measured in sensors.This bridge is used to find the unknown resistance very precisely by comparing it with a known value of resistances. In this bridge, a Null or Balanced condition is used to find the unknown resistance.
What are the two main types of bridges?
Bridges are of two general types: fixed and movable. Fixed bridges are usually classified by their basic geometry such as arches, trusses, beams, girder, suspension and cable stayed. Steel has been used in the construction of bridges for many years.
What is the advantage of bridge circuit?
One of the advantages of using a bridge circuit to measure resistance is that the voltage of the power source is irrelevant. Practically speaking, the higher the supply voltage, the easier it is to detect a condition of imbalance between the four resistors with the null detector, and thus the more sensitive it will be.
What is Anderson bridge in physics?
A large number of AC bridges are available and Anderson’s Bridge is an AC bridge used to measure self inductance of the coil. It is a modification of Wheatstones Bridge. It enables us to measure the inductance of a coil using capacitor and resistors and does not require repeated balancing of the bridge.
What is Stone bridge?
Definition of Wheatstone bridge
: 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.
Which transformer is used in bridge rectifier?
The step-down transformer converts the AC mains supply of 230V to 12V AC. This 12V AC is applied to the bridge rectifier arrangement such that the alternate diodes conduct for each half cycle producing a pulsating DC voltage consisting of AC ripples.
What is Wheatstone bridge formula?
Wheatstone bridge circuit diagram. The unknown resistance Rx is to be measured; resistances R1, R2 and R3 are known, where R2 is adjustable. When the measured voltage VG is 0, both legs have equal voltage ratios: R2/R1 = Rx/R3 and Rx= R3R2/R1.
Why are AC bridges used?
AC bridges are used to find unknown impedances along with associated parameters. Communication system and complex electronics circuitry majorly make use of AC bridges. AC bridge circuits are used in phase shifting and for the filtration of undesirable signals. It is also used to measure the frequency of audio signals.
What is Q factor in AC bridges?
Q Factor definition
In an AC system, the Q factor represents the ratio of energy stored in the capacitor to the energy dissipated as thermal losses in the equivalent series resistance.
Why capacitor is used in Anderson bridge?
So, there is need of bridge which can measure low-quality factor and this bridge is modified Maxwell’s bridge and known as Anderson’s bridge. Actually, this bridge is the modified Maxwell inductor capacitance bridge.
Where is Wheatstone bridge used?
The Wheatstone bridge is used for the precise measurement of low resistance. Wheatstone bridge along with operational amplifier is used to measure physical parameters such as temperature, light, and strain.
What is Wheatstone bridge experiment?
The circuit known as a Wheatstone bridge is most commonly used to determine the value of an unknown resistance to an electrical current.The unknown resistance can be identified by studying and manipulating the path of the current take through the Wheatstone bridge grid.
Why Wheatstone bridge is called bridge?
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.
What are 5 main types of bridges?
Five Types of Bridges
- Beam Bridge. A beam bridge is known for being the simplest and most cost-effective bridge to build.
- Cantilever Bridges.
- Suspension Bridges.
- Arch Bridge.
- Short-Span Bridge.
- Beam Bridge.
- Cantilever Bridges.
- Suspension Bridges.
What are 5 different bridges?
The 5 main types of bridges are:
- Arch Bridge.
- Beam Bridge.
- Cable-stayed Bridge.
- Suspension Bridge.
- Truss Bridge.
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