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NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS

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If a bar is made of copper whose coefficient of linear expansion is one and a half times that of iron, the ratio of the force developed in the copper bar to the iron bar of identical lengths and cross-sections, when heated through the same temperature range (Young’s modulus for copper may be taken equal to that of iron) is

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Correct option: A

\frac{3}{2}

Option A (

\frac{3}{2}

) is correct because the force developed is proportional to the coefficient of linear expansion, and the coefficient of copper is 1.5 times that of iron.

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