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 the importance of 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 the importance and application of a bridge resistor circuit?
Bridge circuits are particularly useful in converting resistance changes into voltage signals that can be input directly into automatic control systems.
What are the main advantages of using 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. We can measure minute changes in the bridge, even in m ohms’.
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 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.
What are the applications of bridge circuits?
The basic applications of a bridge circuits are instrumentation and as signal rectifiers. Advanced applications would be like for DC motor control or as envelope detectors in receivers with amplitude modulation, where information lies in the envelope.
What is 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 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.
Where is Wheatstone bridge used?
The Wheatstone Bridge is used for measuring the very low resistance values precisely. Wheatstone bridge along with operational amplifier is used to measure the physical parameters like temperature, strain, light, etc.
What is the advantage of the Wheatstone bridge method over the direct current and voltage measurement with the voltmeter and ammeter?
The Wheatstone’s bridge is a very accurate method of measuring resistance. No maths. Less chance of incorrect readings. Less chance of error due to the voltmeter and ammeter connection leads.
What is an advantage of using a Wheatstone bridge to measure voltage rather then a simple voltage divider?
The voltage divider circuit had the advantage of simplicity, while the Wheatstone bridge circuit has the advantage of allowing the user to independently set the output offset level.
Which principle operates a bridge circuit?
null indication
Explanation: A bridge circuit operates on the principle of null indication. Based on the deflection of the galvanometer, current flows between the two opposite junctions.
How is the measurement accuracy in a bridge circuit?
How is the measurement accuracy in a bridge circuit? Explanation: The measurement is done by comparing the unknown value with a standard known value. Thus the measurement accuracy is high in a bridge circuit. Explanation: The bridge circuit is generally used in control applications.
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 |
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.
Which of the following are the advantages of Owen’s bridge?
Advantages. The advantages of Owens bridge are, the unknown inductance measured is independent of frequency and doesn’t require any frequency supply. The balance equation can be obtained very easily, and simple. It is used to measure a wide range of inductance in terms of capacitance.
What is the disadvantage of Maxwell bridge?
The disadvantages of a Maxwell Bridge are: The variable standard capacitor is very expensive. The bridge is limited to measurement of low quality coils (1 < Q < 10) and it is also unsuitable for low value of Q (i.e. Q < 1) from this we conclude that a Maxwell bridge is used suitable only for medium Q coils.
What is the disadvantage of Maxwell bridge Mcq?
This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on Maxwell’s Inductance Capacitance Bridge. Explanation: A Maxwell inductance capacitance bridge is used for the measurement of inductance by making comparison with a standard capacitance value.
Would the Wheatstone bridge be used today?
The Wheatstone bridge (or resistance bridge) circuit can be used in a number of applications and today, with modern operational amplifiers we can use the Wheatstone Bridge Circuit to interface various transducers and sensors to these amplifier circuits.
What is the advantage of potentiometer over voltmeter for measuring voltage give appropriate reason?
The advantage of a potentiometer over the voltmeter is that the potentiometer doesn’t draw any current from the circuit in which it is used for the measurement. Whereas the voltmeter draws some amount of current in case of high voltages, which results in some errors in the measurements done using a voltmeter.
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