Q1044
A copper disc has a hole. If the disc is heated, the size of the hole
A.
Increases
AnswerB.
Decreases
C.
No change
D.
First increases and than decreases
Answer: Option A
Solution
Answer: Option A
Solution:
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.