Question

The coefficient of volumetric expansion of lamina is $5 \times$ $10^{-5} /{ }^{\circ} C$. Its coefficient of linear expansion will be:

• A. $1.6 \times 10^{-5} /{ }^{\circ} C$
• B. $1.1 \times 10^{5} /{ }^{\circ} C$
• C. $2 \times 10^{-6} /{ }^{\circ} C$
• D. $3 \times 10 /{ }^{\circ} C$

Answer 1

Answer: (A)

$\alpha=\frac{\gamma}{3}$
$=\frac{5 \times 10^{-5}}{3}$
$=1.6 \times 10^{-5} /{ }^{\circ} C$