A bar of length 'l' and cross sectional area (b × d ) is subjected to an axial force P. Young's modulus of the material is E, Poisson ratio = 1/m. What is the change in volume?
1
\(dv=\frac{Pl}{E}[1-\frac{2}{m}]\)
2
\(dv=\frac{Pl}{E}[m-\frac{2}{m}]\)
3
\(dv=\frac{m}{Pl}[1-\frac{2}{m}]\)
4
\(dv=\frac{Pl}{E}[E-\frac{2}{m}]\)