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Question: A thin copper wire of length L increase in length by 1% when heated from temp T<sub>1</sub> to T<sub...

A thin copper wire of length L increase in length by 1% when heated from temp T1 to T2. What is the percentage change in area when a thin copper plate having dimensions 2L × L is heated from T1 to T2 ?

A

1%

B

2%

C

3%

D

4%

Answer

2%

Explanation

Solution

%changeinlength%changeinArea\frac{\% changeinlength}{\% changeinArea} = αβ\frac{\alpha}{\beta}