The Poisson's ratio of a material is defined as
Alongitudinal strain / lateral strain
B-(lateral strain / longitudinal strain)
Cshear strain / longitudinal strain
Dvolumetric strain / longitudinal strain
Answer & Solution
Correct answer: B. -(lateral strain / longitudinal strain)
$\sigma = -\dfrac{\varepsilon_{\text{lateral}}}{\varepsilon_{\text{longitudinal}}}$. The minus sign makes $\sigma$ positive for normal materials, since a wire stretched longitudinally contracts laterally.
Related questions
\n\nThe figure compares the s\n\nFor the spherical body su\n\nThe diagram above shows a\n\nThe area under the stress\n\nIn the stress-strain curvA wire of length $L$, area $A$ and Young's modulus $Y$ is stretched by hanging a mass $m$ A steel rod is clamped rigidly at both ends and then heated through a temperature rise $\DThe elastic potential energy stored per unit volume in a stretched wire (within the elasti