NEET Physics Thermal Expansion MCQ Question
Which of the following statements about thermal expansion is correct?
The coefficient of volume expansion (αv) is three times the coefficient of linear expansion (αl).
Metals generally have lower coefficients of linear expansion compared to non-metals.
Preventing thermal expansion of a rod by fixing its ends results in tensile strain.
The coefficient of linear expansion for glass is higher than that for copper.
Correct Answer
Detailed Explanation
According to the NCERT context, αv is given as three times αl, meaning αv = 3αl. This relationship indicates that for isotropic expansion, the volume expansion is proportional to the cube of the linear expansion coefficient.
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