In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity.
Why bridge circuits are essential in sensing applications?
Resistance-based bridge circuits are widely used to provide electrical outputs from sensors measuring physical variables, such as pressure and force. These outputs are usually smalland thus require amplification to bring them up to levels required by A/D converters in measurement-and-control systems.
Why is it preferable in bridge circuits that the equations of balance are independent of frequency?
4.In this bridge circuit, balance equations are independent of frequency. This is often a considerable advantage in an ac bridge, for the exact value of the source frequency, need not then be known.
Why are Wheatstone bridges 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.
Why do we use Wheatstone bridge?
Significance. The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate. Variations on the Wheatstone bridge can be used to measure capacitance, inductance, impedance and other quantities, such as the amount of combustible gases in a sample, with an explosimeter.
For what purpose Anderson bridge is used?
In electronics, Anderson’s bridge is a bridge circuit used to measure the self-inductance of the coil. It enables measurement of inductance by utilizing other circuit components like resistors and capacitors.
Which bridge is used for frequency measurement?
Wien’s bridge is used for precision measurement of capacitance in terms of resistance and frequency. It was also used to measure audio frequencies.
Why galvanometer is used in AC bridge?
In AC bridge galvanometer is not used because the rotating torque is dependent on the average current that is passing through the coils of a galvanometer. Also, the average AC current passing through the AC bridge will be zero and there will not be any deflection.
What are the different applications of bridge circuits?
The bridge circuit was mainly designed for measurement purposes in the laboratory. And, one of the middle linking points is adjusted when it is used for a specific purpose. These circuits are used in linear, nonlinear, power conversion, instrumentation, filtering, etc.
Why are Wheatstone bridge circuits very important in measuring resistance accurately?
A Wheatstone’s bridge is more accurate than the other methods of measuring resistance because the resistance is obtained using the null method and is based on Kirchoff’s law. In the null method, the resistance of the galvanometer and the internal resistance of the cell does not affect the null point.
What are the advantage of Anderson Bridge over Maxwell Bridge?
The advantage of Anderson’s bridge over Maxwell’s bridge is that. its final balance equations are independent of inductor losses. it reduces cost by not making capacitor or inductor as the variable parameters. number of bridge components required are less.
Why Kelvin bridge is used for measurement of low resistance?
17. Why Kelvin bridge is used for measurement of low resistance? Explanation: While measuring very low resistances the contact and lead resistances cause significant errors in the value of the measured resistance. As a result Kelvin bridge is used for measurement of low resistances.
What is the function of Carey Foster bridge?
In electronics, the Carey Foster bridge is a bridge circuit used to measure medium resistances, or to measure small differences between two large resistances. It was invented by Carey Foster as a variant on the Wheatstone bridge.
Which bridge is used to determine?
4.6
| Type of Bridge | Name of Bridge | Important |
|---|---|---|
| DC Bridges | Kelvin double bridge | |
| Loss of charge method | ||
| Megger | Resistance of cables | |
| AC Bridges | Maxwell’s inductance bridge | Not suitable to measure Q |
Why AC bridges are used in impedance measurement?
The D.C bridges are used to measure the resistance while the A.C bridges are used to measure the impedances consisting capacitance and inductances. The D.C bridges use the D.C voltages as the excitation voltage while the A.C bridges use the alternating voltage as the excitation voltage.
Where is a bridge used in network?
3. Bridge A bridge operates at the data link layer. A bridge is a repeater, with add on the functionality of filtering content by reading the MAC addresses of source and destination. It is also used for interconnecting two LANs working on the same protocol.
What is a bridge What is the importance of a bridge in electronics?
A bridge can measure other quantities in addition to resistance, depending upon the type of circuit elements used in the arms. It can measure inductance, capacitance, and frequency with the proper combination and arrangement of inductances and capacitances in its arms.
What is bridge in networking with example?
A bridge can be used in computer networks to interconnect two LANs together and separate network segments.This makes it possible to isolate or segment the network data traffic. An example of using a bridge to segment two Ethernet LANs is shown in Figure 5-1.
Why bridge circuit is used to measure a resistance instead of a multimeter?
This is beacause in meter bridge the internal resistance of cell and galvanometer do not affect the reading taken for unknown resistance.. Also in this voltage and current are not calculated so resistance of voltmeter and ammeter also has no role to play..
What is difference between Maxwell and Anderson Bridge?
By Anderson’s bridge, one can measure inductance by utilizing other circuit components like resistors and capacitor.In Maxwell’s bridge, the inductance is calculated by comparing it with a standard variable capacitance.
What is the significance of capacitors in a Maxwell bridge?
What is the significance of capacitors in a Maxwell bridge? Explanation: In a Maxwell inductance capacitance bridge, the capacitors are cheaper when compared to a stable and accurate standard value of inductors.
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