Question

A metal rod of length $L_0$, made of material of Young’s modulus Y, area A is fixed between two rigid supports. The coefficient of linear expansion of the rod is $\alpha$. The rod is heated such that the compressive force in the rod is T

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

$Thermalstress=y\times \Delta \theta \alpha A=y\times \Delta \theta \Rightarrow T=Ay\times \Delta \theta$