Sensitivity of strain gauge implies

Q.  Sensitivity of strain gauge implies _____.
- Published on 23 Oct 15

a. Unit change in R per unit change in 'l'
b. Unit change in L per unit change in 'l'
c. Unit change in C per unit change in 'l'
d. Unit change in Y per unit change in 'l'

ANSWER: Unit change in R per unit change in 'l'
 
Sensitivity is basically a dimensionless quantity & implies the change in resistance due to change in length of wire at a unity level. Generally, there are mainly two types of strain gauges like wired strain gauge & semiconductor strain gauge. Semiconductor strain gauges are sensitive to maximum extent as compared to that of wire type & hence they yield more accuracy and resolution. Intuitively, sensitivity measures the degree of accuracy & resolution. More the level of sensitivity, high will be the rate of accuracy & resolution.

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