A uniform metal rod of `2mm^(2)` area of cross section is heated from `0^(@)C` to `20^(@)C`.
Channel: Doubtnut
Date: 07/06/2020

A uniform metal rod of `2mm^(2)` area of cross section is heated from `0^(@)C` to `20^(@)C`. The coefficient of linear expansion of the rod is `12xx10^(-6)//""^(@)C`. Its Young's modulus of elasticity is `10^(11)N//m^(2)`, then the energy stored per unit volume of rod is,