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113 Define Co-efficient of linear expansion andderive the relationL2 = L (1 + aAT]SWER: |
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Answer» We define average coefficent of LINEAR EXPANSION in the temperature range ΔT as:α¯=1LΔLΔTThe coefficient of linear expansion at temperature T is the limit of average coefficient as ΔT→0, i.e.,α=limΔT→01LΔLΔT=1LdLdTSuppose the length of a rod at 0∘C is L0, and at temperature θ (MEASURED in Celsius) is Lθ. If α is SMALL and constant over given temperature interval,α=Lθ−L0L0θ |
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