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A circular rod of dia 30 mm and length 200mm is extended to 0.09mm length and 0.0045 diameters through a tensile force. What will be its Poissons ratio?

A circular rod of dia 30 mm and length 200mm is extended to 0.09mm length and 0.0045 diameters through a tensile force. What will be its Poissons ratio? Correct Answer 0.33

Poissons ratio = lateral strain / longitudinal strain = δD/D x L/δL = 0.0045/30 x 200/0.09 = 0.33.

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