First slide

Thermal expansion

Question

The average value of $' α'$ for an anisotropic solid is

Easy

A

$α = \frac{α_{1} + α_{2} + α_{3}}{2}$
B

$α = \frac{α_{1} + α_{2} + α_{3}}{4}$
C

$α = \frac{α_{1} + α_{2} + α_{3}}{5}$
D

$α = \frac{α_{1} + α_{2} + α_{3}}{3}$

Solution

when coefficient of linear expansion is different for 3 different mutually perpendicular directions of solid then their average value is considered

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