1.

Two rods of length L1 and L2 are welded together to make a composite rod of length (L1+L2). If the coefficients of linear expansion of the rod are α1 and α2 respectively, the effective coefficient of linear expansion of the composite rod will be

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Two rods of length L1 and L2 are welded together to make a composite rod of length (L1+L2). If the coefficients of linear expansion of the rod are α1 and α2 respectively, the effective coefficient of linear expansion of the composite rod will be




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