Q. A copper disc has a hole. If the disc is heated, the size of the hole
✅ Correct Answer: (A)
Increases
Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.
Explanation by: Team MCQ Buddy
When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.