Questions
Two rods of lengths L1 and L2 are welded together to make a composite rod of length (L1+L2). If the coefficient of linear expansion of the materials of the rods are α1 and α2 respectively, the effective coefficient of linear expansion of the composite rod is
detailed solution
Correct option is B
Δ1Δt=L1a1;Δ2Δt=L2a2∴ΔLΔt=Δ1Δt+Δ2Δt;L1+L2a=L1a1+L2a2Talk to our academic expert!
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