Saved Bookmarks
| 1. |
Why does the cord of an electric ovan not glow while its heating element does? |
| Answer» Cord is made up of an inner conducting wire of low resistance and an outer covering of insulating material. Since the conducting wire has low resistance, the electric energy is converted to heat to far less extent than in the heating element which is often a very high resistance material.So,the heat energy shows as the increasing temperature of the heating element, and the temperature becomes so high that the radiation of the heat falls in our visible range, hence we see glowing heating element. | |