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% $
