R

Ram Sharma • 193.88K Points
Coach Physics

Q. A copper disc has a hole. If the disc is heated, the size of the hole

  • (A) No change
  • (B) decreases
  • (C) increases
  • (D) 1st increases & than decreases
  • Correct Answer - Option(C)
  • Views: 439
  • Filed under category Physics
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.

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