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The value of coefficient of thermal expansion is always the same for a material. True or False?

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in Physics – Class 11 by (74.2k points)
The value of coefficient of thermal expansion is always the same for a material. True or False?

(a) True

(b) False

This question was posed to me in an interview for job.

My query is from Thermal Expansion topic in division Thermal Properties of Matter of Physics – Class 11

1 Answer

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Best answer
Right answer is (b) False

Best explanation: The coefficient of thermal expansion is constant over a range of temperature, but is not always constant. It depends on temperature. For eg: the graph of coefficient of volume expansion of copper with temperature is shown below.

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