A crystal has a coefficient of expansion 13 x $10^{- 7}$ $12 \times 10^{- 7} /^{0} C$ and $10 \times 10^{- 7} /^{0} C$ in three mutually perpendicular directions respectively $.$ Then the coefficient of cubical expansion of the crystal is

46 x

10^{- 7}

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24 x

10^{- 7}

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35x

10^{- 7}

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25 x

10^{- 7}

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Solution

The correct option is C 35x $10^{- 7}$
$\begin{matrix} γ = α_{1} + α_{2} + α_{3} = 35 \times 10^{- 7} /^{0} C \end{matrix}$
Hence,
option $(C)$ is correct answer.

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A crystal has a coefficient of expansion 13 x 10−7 12×10−7/0C and 10×10−7/0C in three mutually perpendicular directions respectively. Then the coefficient of cubical expansion of the crystal is

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A crystal has a coefficient of expansion 13 x $10^{- 7}$ $12 \times 10^{- 7} /^{0} C$ and $10 \times 10^{- 7} /^{0} C$ in three mutually perpendicular directions respectively $.$ Then the coefficient of cubical expansion of the crystal is

The correct option is C 35x $10^{- 7}$
$\begin{matrix} γ = α_{1} + α_{2} + α_{3} = 35 \times 10^{- 7} /^{0} C \end{matrix}$
Hence,
option $(C)$ is correct answer.