Physics And Measurement Question 173
Question: A thin copper wire of length l metre increases in length by 2% when heated through 10ºC. What is the percentage increase in area when a square copper sheet of lengthlmetre is heated through 10ºC
Options:
A) 4%
B) 8%
C) 16%
D) None of the above
Show Answer
Answer:
Correct Answer: A
Solution:
Since percentage increase in length = 2 %
Hence, percentage increase in area of square sheet $ =2\times 2% $ = 4%
