A steel rod is clamped at its two ends a...

A steel rod is clamped at its two ends and rests on a fixes horizontal base. The rod is unstrained at `20^@C`. Find the longitudinal strain developed in the rod if the temperature rises to `50^@C`. Coefficient of linear expansion of steel `=1.2 xx 10^(-5 @)C^(-1)`.

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The correct Answer is:

`3.6xx10^(-4)`

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