Question

Two spheres made of the same material have the same diameter. One sphere is hollow and the other is solid. If they are heated through the same range of temperature,

• A. $\text{the hollow sphere will expand more than the solid sphere}$
• B. $\text{the solid sphere will expand more than the hollow sphere}$
• C. $\text{both spheres will expand equally}$
• D. $\text{the hollow sphere will not expand at all}$

Answer 1

The correct option is C $\text{both spheres will expand equally}$

Thermal expansion of isotropic bodies is independent of shape, size and availability of hole/cavity.
$\therefore$ Option (c) is correct