NEET UG PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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An anisotropic substance has coefficients of linear thermal expansions

{\alpha_1},\,\,{\alpha_2},\,\,{\alpha_3}

along x, y, z axes respectively. Coefficient of cubical expansion of its material is

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Correct option: A

{\alpha_1} + {\alpha_2} + {\alpha_3}

Option A is correct. The coefficient of cubical expansion for an anisotropic substance is the sum of the coefficients of linear expansion along the three axes:

{\alpha_1} + {\alpha_2} + {\alpha_3}

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is placed in an insulation box of wall thickness

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. The box keeping the ice cube at

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127^{\circ} \mathrm{C}

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\sigma

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