Q. A brass disc fits simply in a hole of a steel plate. The disc from the hole can be loosened if the system
A) First heated then cooled
B) First cooled then heated
C) Is heated
D) Is cooled
Explanation
(d) Since, the coefficient of linear expansion of brass is greater than that of steel. On cooling, the brass contracts more, so, it get loosened
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.