A steel rod of length 0.5km is used in t...

A steel rod of length `0.5km` is used in the construction of a bridge. It has to withstand a temperature change of `40^(0)C`. The gap that is allowed for its expansion is `[alpha = 10^(-6//@)C]`

`0.02cm`

`2m`

`20 mm`

Text Solution

Verified by Experts

The correct Answer is:

`l_(2) - l_(1) = l_(1)alphaDeltat`

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