A thin copper wire of length `1` metre increases in length by `2%` when heated through `10^(@)C`. What is the percentage increase in area when a square copper sheet of length `1` metre is heated through `10^(@)C` ?

Options

A. 0.04
B. 0.08
C. 0.16
D. none of these

Answer

A

Explanation

As area `="length"^(2)" ":.(DeltaA)/Axx100=2(Deltal)/lxx100=2xx2%=4%`