KVPY SX SB Exam 20141 Question Paper

Question : 26 of 120

Marks: +1, -0

A solid expands upon heating because

the potential energy of interaction between atoms in the solid is asymmetric about the equilibrium positions of atoms.
the frequency of vibration of the atoms increases.
the heating generates a thermal gradient between opposite sides.
a fluid called the caloric flows into the interatomic spacing of the solid during heating thereby expanding it.

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