List of top Physics Questions on Stress and Strain asked in AP EAPCET

Two copper wires of length $L$ and $2L$ have radii $r$ and $2r$ respectively. If they are subjected to the same tension force, the ratio of their extension ($\Delta L_1 / \Delta L_2$) is:

A horizontal metal rod of diameter 4 cm projects 6 cm from a wall. The shear modulus of the metal is \(3 \times 10^{10}\, N\,m^{-2}\). An object of mass 1100 kg is suspended from the free end of the rod. The free end of the rod moves down by a distance. (Take \(g = 10\,m\,s^{-2}\), neglect mass of rod)

A piece of metal having a square cross section of area 400 mm\(^2\) is pulled with 40 kN force, producing only elastic deformation. If the Young's modulus of the metal is \(40 \times 10^9~\text{N/m}^2\), then the strain is: