Question

Two holes of unequal diameters $d_{1}$ and $d_{2}(d_{1} > d_{2})$ are cut in a metal sheet. If the sheet is heated

• A. Both $d_{1}$ and $d_{2}$ will decrease
• B. Both $d_{1}$ and $d_{2}$ will increase
• C. $d_{1}$will increase, $d_{2}$ will decrease
• D. $d_{1}$will decrease, $d_{2}$ will increase

Answer 1

Answer: (B)

Both $d_{1}$ and $d_{2}$ will increase

Answer 2

If the sheet is heated then both d₁ and d₂ will increase since the thermal expansion of isotropic solid is similar to true photographic enlargement.