TS EAMCET 11-Sep-2020 Shift 2 Solved Paper

If a rod or wire of length L and cross-section area A under the action of stretching force F applied normally to its face suffers a increase ∆L in length, then
Y=‌

‌ tensile stress ‌

‌ longitudinal strain ‌

=‌

F/A

∆L L

Hence, Young's modulus is proportionality constant that relates the force per unit area applied perpendicularly at the surface of an object to the fractional change in length.