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A metal rod having a linear coefficient of expansion 2 × 10^-5 /°C has a length 1m at 25°C, the temperature at which it is shortened by 1 mm is (1983 E)

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50°C

-50°C

-25°C

-12.5°C

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detailed solution

Correct option is C

t2−t1=l2−l1l1Δt

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A metal rod having a linear coefficient of expansion 2 × 10-5 /°C has a length 1m at 25°C, the temperature at which it is shortened by 1 mm is (1983 E)

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A metal rod having a linear coefficient of expansion 2 × 10^-5 /°C has a length 1m at 25°C, the temperature at which it is shortened by 1 mm is (1983 E)