Choose the correct option for the following Assertion (A) and Reason (R).

Question

G1 Physics · Accepted Answer

For small uniaxial deformation, ε(volume) = ε(longitudinal) +2ε(transverse). Using ε(transverse) = −νε(longitudinal), we get ε(volume) = ε(longitudinal)(1−2ν). For an incompressible material, ε(volume) = 0. For non-zero longitudinal strain, 1−2ν = 0. Thus, ν = 1/2. Therefore both Assertion and Reason are true, and the Reason correctly explains the Assertion. Correct option: A.