Consider the following statements A and B and identify the correct...

Statement A: Peltier coefficient is numerically equal to the potential difference across the junctions of the thermocouple through which current is flowing. ✅ True — By definition, the Peltier coefficient (π) is the amount of emf (potential difference) per unit current at the junction. Statement B: According to Thomson, energy is neither absorbed nor evolved at the junction of a thermocouple but only along the lengths of both conductors. ❌ False — This is not correct. The Thomson effect states that heat is absorbed or evolved along the length of a conductor carrying current in a temperature gradient, but at the junctions, heat exchange does occur due to the Peltier effect.