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Mechanical gauges measure the _______

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Mechanical gauges measure the _______

(a) change in resistance

(b) change in length

(c) change in area

(d) change in inductance

I had been asked this question during an interview.

Asked question is from Types of Strain Gauges in section Transducers of Electrical Measurements

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The correct choice is (b) change in length

To explain: A mechanical gauge is used to measure the change in length. They make use of gears. Mechanical gauges are used for static strain measurements only.

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