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
$$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B
$$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C
$$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D
$$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
Correct Answer: $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
