A thin copper wire of length l metre increases in length by 2% when heated through 10°C. What is the percentage increase in the area when a square copper sheet of length l metre is heated through 10°C?
A. 4%
B. 8%
C. 16%
D. None of these
Answer:A
A thin copper wire of length l metre increases in length by 2% when heated through 10°C. What is the percentage increase in the area when a square copper sheet of length l metre is heated through 10°C?
A. 4% B. 8% C. 16% D. None of these