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NDA 2 2024 GAT, question 94

Topic: Physics

Q94

Which one of the following statements best defines the concept of heat ?

  1. (a) The transformation of energy from one form to another
  2. (b) The conversion of energy into mass and vice-versa due to temperature difference
  3. (c) The transfer of energy due to temperature differenceCorrect answer
  4. (d) The change in volume of a substance with temperature

Solution.

Answer: (c) The transfer of energy due to temperature difference

  1. Heat flows spontaneously because of a temperature difference, from a hotter body toward a colder one.
  2. Equal temperatures mean thermal equilibrium even if the bodies have different masses or total internal energies.