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Question

The co-efficient of real expansion of a liquid is 7×104/oC. The co-efficient of linear expansion of the vessel is 1×105/oC. The co-efficient of apparent expansion of the liquid is :


A
7×104/oC
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B
6×105/oC
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C
67×105/oC
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D
73×105/oC
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Solution

The correct option is C 67×105/oC
γr=γa+γg=γa+3αg
Given
αg=1x105/0C
γr=7x104/0C
γa=7×104/0C - 3×105/0C=70x105/0C - 3x105/0C=67x105/0C

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