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Physics > Thermodynamics And Kinetic Theory > Thermodynamics

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Coefficient of linear expansion of brass and steel rods are α1\alpha_1 and α2\alpha_2. Lengths of brass and steel rods are l1l_1 and l2l_2 respectively. If (l2−l1)(l_2 - l_1) is maintained same at all temperatures, which one of the following relations holds good?

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