A) \[2.5\times {{10}^{-5}}{{/}^{o}}C\]
B) \[2.0\times {{10}^{-5}}{{/}^{o}}C\]
C) \[1.5\times {{10}^{-5}}{{/}^{o}}C\]
D) \[1.2\times {{10}^{-5}}{{/}^{o}}C\]
Correct Answer: B
Solution :
Linear expansion coefficient \[\alpha =\frac{\gamma }{3}=\frac{1}{3}\cdot \frac{\Delta V}{V\Delta t}\] \[\Rightarrow \] \[\alpha =\frac{1}{3}\cdot \frac{0.15}{100\times 24}\] \[\Rightarrow \] \[\alpha =2\times {{10}^{-5}}{{/}^{o}}C\]
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