1.State Hooke's Law and draw the stress-strain curve for a metallic wire clearly marking yield point and breaking point.
2.A steel wire of length $2\text{ m}$ and cross-sectional area $2\text{ mm}^2$ is stretched by $1\text{ mm}$ under load. Find Young's Modulus if load is $200\text{ N}$.
3.Define Poisson's ratio $\sigma$ and state its theoretical limits.
