Poisson’s ratio is given by which of the following relation?(a) µ = –\(\frac{\Delta d/d}{\Delta l/l}\)(b) µ = –\(\frac{\Delta d}{\Delta l/l}\)(c) µ = –\(\frac{d}{\Delta l/l}\)(d) µ = –\(\frac{\Delta d/d}{\Delta l}\)This question was addressed to me during an online interview.My query is from Operation of Strain Gauges topic in portion Transducers of Electrical Measurements

Poisson’s ratio is given by which of the following relation?(a) µ =

1.	Poisson’s ratio is given by which of the following relation?(a) µ = –\(\frac{\Delta d/d}{\Delta l/l}\)(b) µ = –\(\frac{\Delta d}{\Delta l/l}\)(c) µ = –\(\frac{d}{\Delta l/l}\)(d) µ = –\(\frac{\Delta d/d}{\Delta l}\)This question was addressed to me during an online interview.My query is from Operation of Strain Gauges topic in portion Transducers of Electrical Measurements
Answer» Correct choice is (a) µ = –\(\frac{\Delta d/d}{\Delta l/l}\) For explanation I would say: POISSON’s ratio is GIVEN by the relation µ = –\(\frac{\Delta d/d}{\Delta l/l}\) where,d is the DIAMETER of the cross-section of the WIRE ∆d is the change in the diameter of cross-section of the wire.

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