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10-1.Thermometry, Thermal Expansion and Calorimetry
medium
A crystal has a coefficient of expansion $13\times10^{-7}$ in one direction and $231\times10^{-7}$ in every direction at right angles to it. Then the cubical coefficient of expansion is
A
$475\times10^{-7}$
B
$244\times10^{-7}$
C
$462\times10^{-7}$
D
$257\times10^{-7}$
(AIIMS-2014)
Solution
$\gamma = {\alpha _1} + {\alpha _2} + {\alpha _3}$
$ = 13 \times {10^{ – 7}} + 231 \times {10^{ – 7}} + 231 \times {10^{ – 7}}$
$ = 475 \times {10^{ – 7}}$
Standard 11
Physics
