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)?

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  1. $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
  2. $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
  3. $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
  4. $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$

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Answer: Option 2

Let'

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