Question

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

• A. Both spheres will expand equally.
• B. Hollow sphere will expand more than solid one.
• C. Solid sphere will expand more than hollow one.
• D. Hollow sphere will expand double that of solid one

Answer 1

Answer: (A)

Here, we know that both the body is made up of same material, hence its orientation will do not affect it's expansion.
Hence, $\frac{\Delta V _{\text {solid }}}{ V _{\text {solid }}}=\frac{\Delta V _{\text {hollow }}}{ V _{\text {hollow }}}=\gamma \Delta T$
Therefore we can say both sphere will expand same, because material used for making both of them are same.