Electric kettle

The most notable development in small appliances has been that of the electric kettle. The electric kettle consists of a container, handle and an element.
The electric kettle converts about 80 per cent of electricity used into energy that heats the water. In electric kettle, the heating element is enclosed in a metal tube and electrically insulated from it. In some cases the heating element is embedded in a brass chromium plated tube and insulated.

When a current flows through the heating element, the water around the element is heated first by conduction. Then the heat is spread through the water by convection. It is important to ensure that the heating element is covered with water otherwise the element will overheat and will ‘blow’.
Electric kettle

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