Question

Why does the cord of an electrical heater not glow while the heating elements does

Answer 1

The heat produced by electric current is directly proportional to the resistance.Now the heater element has very high resistance so a lot of heat is produced in the heater element due to which it becomes very hot and glow.On the other hand,the cord of an elecric heater has very low resistance due to which very little heat is produced in it and so the cord becomes slightly warm but doesn 't glow.