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

  • (A) Increases
  • (B) Decreases
  • (C) No change
  • (D) First increases and than decreases
  • Correct Answer - Option(A)
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  • Filed under category Physics
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Explanation by: Admin
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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