Q. At some temperature $T,$ a bronze pin is a little large to fit into a hole drilled in a steel block. The change in temperature required for an exact fit is minimum when
A) Only the block is heated
B) Both block and pin are heated together
C) Both block and pin are cooled together
D) Only the pin is cooled
Explanation
(a) Since coefficient of expansion of steel is greater than that of bronze, hence with small increase in it’s temperature the hole expands sufficiently
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.