Wheatstone Bridge Sensitivity Equation

The upper range of the bridge can be increased with the help of the applied emf and the lower range is limited by connecting the lead at the binding post. The sensitivity of a wheatstone bridge is defined as the deflection in the galvanometer per unit current.

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The wheatstone bridge was originally developed by charles wheatstone to measure unknown resistance values and as a means of calibrating measuring instruments voltmeters ammeters etc by the use of a long resistive slide wire.

Wheatstone bridge sensitivity equation. A wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit one leg of which includes the unknown componentthe primary benefit of the circuit is its ability to provide extremely accurate measurements in contrast with something like a simple voltage divider. The wheatstone bridge consists of four resistances r1 r2 r3 and r4 an excitation voltage and an output voltage. The wheatstone bridge can still be used to measure very low values of resistances.

Wheatstone bridge is a very important device used in the measurement of medium resistances. Wheatstone bridge circuit operation wheatstone bridge analysis and calculator the illustration below shows a basic bridge circuit which consists of three known resistances r 1 r 2 and r 3 variable an unknown variable resistor r x rtd a source of voltage and a sensitive ammeter. Thus the deflection rate is the function of sensitivity.

A wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit. The amount of deflection is a function of the sensitivity of the galvanometer. The wheatstone bridge measures resistance from few ohms to megohms.

Although today digital multimeters provide the simplest way to measure a resistance. In order to determine the bridge balance equation. Sensitivity of the wheatstone bridge.

It is still an accurate and reliable instrument and is extensively used in the industry. Sensitivity of a wheatstone bridge when the bridge is in an unbalanced condition current flows through the galvanometer causing a deflection of its pointer. The wheatstone bridge is more sensitive when all their resistances are equal or.

A wheatstone bridge has been in use longer than almost any electrical measuring instrumen t. Its operation is similar to the original potentiometer. In the unbalanced condition of the bridge when current flows it causes the pointer of galvanometer to get deflected.

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