Strenght of Materials

Q.

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body)

A. `(P.l.A)/(E)`
B. `(P.l)/(A.E)`
C. `(E)/(P.l..A)`
D. `(A.E)/(P.l)`

Answer : Option B

Explanation :