Question

$A$ and $B$ are made up of an isotropic medium. Both $A$ and $B$ are of equal volume. Body $B$ has spherical cavity as shown in the Figure. Which of the following statements is true?

• A. $\text{Expansion in volume of}A>\text{expansion in}B$
• B. $\text{Expansion in volume of}B>\text{expansion in}A$
• C. $\text{Expansion in}A=\text{expansion in}B$
• D. $\text{None of these}$

Answer 1

The correct option is C $\text{Expansion in}A=\text{expansion in}B$

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