Q. A copper disc has a hole. If the disc is heated, the size of the hole
✅ Correct Answer: (C)
increases
Explanation: increases.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: Ram Sharma
increases.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.