Physics And Measurement Question 289

Question: A thin copper wire of length / metre increases in length by 2% when heated through $ 10{}^\circ C $ . What is the percentage increase in area when a square copper sheet of length / metre is heated through $ 10{}^\circ C? $

Options:

A) 4%

B) 8%

C) 16%

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Since percentage increase in length =2% Hence, percentage increase in area of square $ 2\times 2%=4% $



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