Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Physics Thermal Properties of Matter Temperature and heat
Which one of the following statements is correct?
1
Any energy transfer that does not involve temperature difference in some way is not heat
2
Any energy transfer always requires a temperature difference
3
On heating the length and volume of the object remain exactly the same.
4
Whenever there is a temperature difference, heat is the only way of energy transfer