Question

2: Are there any metallic materials which conduct electricity but not heat. If so name the materials and explain this unusual phenomenon

Answer 1

YES.Sciences have found VO2 vanadium dioxide a surprisingly strange behaving material the behaves opposite to Weidmann = Franze law, which links both thermal and electrical properties, stating that they are proportional, but in VO2 we find that heat transfer is significantly low compared to electrical conduction due to the fact that electrons move in a laminar flow, close to each other thus affecting the heat flow rate.Because heat is transferred by moving electrons which move in the number of ways, but in VO2 their movement is constrained cause this unusual phenomenon.