Electrical Resistance Strain Gage

Essay specific features

 

Issue:

Technology

 

Written by:

Dave W

 

Date added:

November 12, 2016

 

Level:

University

 

Grade:

A

 

No of pages / words:

5 / 1152

 

Was viewed:

4330 times

 

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Essay content:

It is used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. Its operation is similar to the original potentiometer except that in potentiometer circuits the meter used is a sensitive galvanometer. Here, Rx is the unknown resistance to be measured; R1, R2 and R3 are resistors of known resistance and the resistance of R2 is adjustable...
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Its operation is similar to the original potentiometer except that in potentiometer circuits the meter used is a sensitive galvanometer. Here, Rx is the unknown resistance to be measured; R1, R2 and R3 are resistors of known resistance and the resistance of R2 is adjustable. If the ratio of the two resistances in the known leg (R2 / R1) is equal to the ratio of the two in the unknown leg (Rx / R3), then the voltage between the two midpoints will be zero and no current will flow between the midpoints...
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