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A steel tape is calibrated at 20°C. when the temperature of the day is -10°C, the percentage error in the measurement with the tape is $(α = 12 \times 10^{- 6} /^{0} C)$

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detailed solution

Correct option is D

Δl=lαΔt⇒Δll×100=αΔt×100

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A steel tape is calibrated at 20°C. when the temperature of the day is -10°C, the percentage error in the measurement with the tape is α=12×10−6/0C

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A steel tape is calibrated at 20°C. when the temperature of the day is -10°C, the percentage error in the measurement with the tape is $(α = 12 \times 10^{- 6} /^{0} C)$