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A length of 2m is measured using a metal tape at 10⁰C. It is calibrated at a temperature 30⁰C. The actual length is (α = 1 x 10^-4/C⁰)

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2.004 m

1.996 m

1.004 m

0.004 cm

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detailed solution

Correct option is B

Thermal contraction of 2m length = Actual length = 2 - (0.004) = 1.996m

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A length of 2m is measured using a metal tape at 100C. It is calibrated at a temperature 300C. The actual length is (α = 1 x 10-4/C0)

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A length of 2m is measured using a metal tape at 10⁰C. It is calibrated at a temperature 30⁰C. The actual length is (α = 1 x 10^-4/C⁰)