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A steel rod of length 0.5km is used in the construction of a bridge. It has to withstand a temperature change of 40°C. The gap that is allowed for its expansion is [α = 10^-6/°C]

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0.02 cm

0.02 mm

2 m

20 mm

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detailed solution

Correct option is D

l2−l1=l1aΔt

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A steel rod of length 0.5km is used in the construction of a bridge. It has to withstand a temperature change of 40°C. The gap that is allowed for its expansion is [α = 10-6/°C]

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A steel rod of length 0.5km is used in the construction of a bridge. It has to withstand a temperature change of 40°C. The gap that is allowed for its expansion is [α = 10^-6/°C]