After putting a hole in a metal plate, the plate is heated. What will be the effect of heating on the hole?
A
Increase
B
Decrease
C
Same
D
None of these
Correct Option:
A
Explanation
When a metal plate is heated, every linear dimension expands—including the boundary of a hole. A useful trick: imagine the hole temporarily filled with the same metal. That imaginary metal would expand on heating, so when you remove it, the hole must also have become larger.
