Question

The superficial expansion of a metal is $\beta$ and volume expansion is $\gamma$, then :

• A. $\beta =\frac{\gamma }{2}$
• B. $\beta =\frac{\gamma }{3}$
• C. $\beta =\frac{2\gamma }{3}$
• D. $\beta =\frac{3\gamma }{2}$

Answer 1

The correct option is C $\beta =\frac{2\gamma }{3}$

$Answer:-$ C

$\alpha$- linear expansion

$\beta$-superficial expansion

$\gamma$-volume expansion

$\alpha :\beta :\gamma =1:2:3$

We can write: $\alpha =\frac{\gamma }{3},\beta =2\alpha =\frac{2\gamma }{3}$