Embibe Experts Solutions for Chapter: Elasticity, Exercise 1: CUSAT CAT 2017

Two wires are made of the same material and have the same volume. However, wire $1$ has cross-sectional area $\mathrm{A}$ and wire $2$ has cross-sectional area $3\mathrm{A}$. If the length of wire $1$ increase by $\mathrm{\Delta }x$ on applying force $\mathrm{F}$, the force needed to stretch wire $2$ by the same amount is

Which one of the following is most elastic in nature?

If $S$ is stress and $Y$ is Young's modulus of material of a wire, the energy stored in the wire per unit volume is