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A steel rod of length 1m is heated from $25^{0} C t o 75^{0} C$ keeping its length constant. The longitudinal strain developed in the rod is (Given : Coefficient of linear expansion of steel $= 12 \times 10^{- 6} /^{0} C$ )

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Correct option is C

longitudinal strain= αt and it is compressive

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A steel rod of length 1m is heated from 250C to 750C keeping its length constant. The longitudinal strain developed in the rod is (Given : Coefficient of linear expansion of steel =12×10−6/0C )

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A steel rod of length 1m is heated from $25^{0} C t o 75^{0} C$ keeping its length constant. The longitudinal strain developed in the rod is (Given : Coefficient of linear expansion of steel $= 12 \times 10^{- 6} /^{0} C$ )