Question

A rod of length $1\text{m}$ rests on smooth horizontal floor. If the rod is heated from $0^{\circ }\text{C}$ to ${10}^{\circ }\text{C}$, find the longitudinal strain developed ?
Take Young's modulus of the rod be $2\times {10}^6\text{Pa}$

• A. ${10}^{-4}$
• B. $3\times {10}^{-4}$
• C. Zero
• D. $2\times {10}^{-4}$

Answer 1

The correct option is C Zero

We known that, when rod is freely expands, stress produced = 0


stress $\propto$ strain
so strain = 0