A steel rod of length `1 m` is heated from `25^@ "to" 75^@ C` keeping its length constant. The longitudinal strain developed in the rod is ( Given, coefficient of linear expansion of steel = `12 xx 10^-6//^@ C`).A. `6 xx 10^-4`B. `-6 xx 10^-5`C. `-6 xx 10^-4`D. zero

A steel rod of length `1 m` is heated from `25^@ "to" 75^@ C` keeping

1.	A steel rod of length `1 m` is heated from `25^@ "to" 75^@ C` keeping its length constant. The longitudinal strain developed in the rod is ( Given, coefficient of linear expansion of steel = `12 xx 10^-6//^@ C`).A. `6 xx 10^-4`B. `-6 xx 10^-5`C. `-6 xx 10^-4`D. zero
Answer» Correct Answer - C It means rod is compressed from its natural length by `Delta l`. `:.` Strain `= - (Delta l)/l = -(l Delta alpha Delta theta)/l` `= (- alpha d theta) = - (12 xx 10^-6)(50)` = `- 6 xx 10^-4`.

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A steel rod of length `1 m` is heated from `25^@ "to" 75^@ C` keeping its length constant. The longitudinal strain developed in the rod is ( Given, coefficient of linear expansion of steel = `12 xx 10^-6//^@ C`).A. `6 xx 10^-4`B. `-6 xx 10^-5`C. `-6 xx 10^-4`D. zero

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