Two substance of same size are made of same material but one is hollow and the other is solid. They are heated to same temperature, then

Options

A. both spheres will expand equally
B. hollow sphere will expand more than the solid one
C. solid sphere will expand more than the hollow one
D. None of these

Answer

A

Explanation

The expansion of the cavity is same as if it had been a solid body of the same material. Hence
`(DeltaV_(s))/(V_(s))=(DeltaV_(h))/(V_(h))=gamma Delta T`