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Question

The coefficient of linear expansion of crystal in x-direction is 6×105/oC and that in y and z- directions is 4×105/oC. The coefficient of cubical expansion of the crystal is?

A
18×105/oC
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B
16×105/oC
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C
14×105/oC
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D
32×105/oC
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Solution

The correct option is C 14×105/oC
γ=αx+αy+αz
γ=6×105+4×105+4×105
γ=14×105/oC

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