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Question

The coefficient of expansion of a crystal in one direction (x-axis) is 2.0×106 K1 and that in the other two perpendicular directions (y and z-axes) is 1.6×106 K1,What is the coefficient of cubical expansion of the crystal?


A

1.6×106 K1

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B

1.8×106 K1

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C

2.0×106 K1

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D

5.2×106 K1

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Solution

The correct option is D

5.2×106 K1


Coefficient of cubical expansion, γ=αx+αy+αz=αx+2ay=2.0×106+2×1.6×106=5.2×106 K1
Hence, the correct choice is (d).


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