The co-efficient of apparent expansion of a liquid in a vessel A is 18×10−4/oC and in vessel B is 21×10−4/oC. The difference in the coefficients of linear expansions of A and B is :
A
1×10−3/oC
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B
1×10−6/oC
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C
1×10−5/oC
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D
1×10−4/oC
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Solution
The correct option is B1×10−4/oC γr=γa+γg=γa+3αg γr=γa1+3α1=γa2+3α2 for both vessels A and B ∴18×10−4+3α1=21×10−4+3α2 ∴3(α1−α2)=3×10−4 ∴α1−α2=1×10−4/ 0C