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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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A steel meter scale is to be ruled so that millimeter intervals are accurate within about 5×10−5mm5 \times {10^{ - 5}}mm at a certain temperature. The maximum temperature variation allowable during the ruling is (Coefficient of linear expansion of steel =10×10−6K−1)= 10 \times {10^{ - 6}}{K^{ - 1}})
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Correct option: B
50C{5^0}C
Option B (50C{5^0}C) is correct because the temperature variation is calculated using the linear expansion formula ΔL=αL0Δθ\Delta L = \alpha L_0 \Delta \theta.

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