NEET Physics Thermal Expansion MCQ Question
Which of the following statements regarding thermal expansion is correct?
All materials expand when heated and contract when cooled.
Gases generally have lower coefficients of thermal expansion compared to solids.
The coefficient of linear expansion is always equal to the coefficient of volume expansion.
Copper expands less than glass for the same temperature increase.
Correct Answer
Detailed Explanation
Most substances indeed expand on heating and contract on cooling, confirming statement A. Statement B is incorrect as gases typically expand more than solids. Statement C is incorrect because the coefficient of volume expansion is three times that of linear expansion for isotropic materials. Statement D is incorrect since copper actually expands more than glass.
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