Question

Copper wire of length I increase in length by 1% when heated from temperature T₁ to T₂. Find the percentage change in area When a copper plate of dimensions 2I x I is heated to T₁ to T₂

Answer 1

From length expansion equation \(\frac{ΔL}{L}\) = \(a_LΔT\)

From Area expansion equation, \((\frac{ΔV}{V_0})\) = \(a_A ΔT\)