Electric heating is any process in which electrical energy is converted to heat. Common applications include heating of buildings, cooking, and industrial processes.
An electric heater is an electrical appliance that converts electrical energy into heat. The heating element inside every electric heater is simply an electrical resistor, and works on the principle of Joule heating: an electric current through a resistor converts electrical energy into heat energy.
Alternatively, a heat pump uses an electric motor to drive a refrigeration cycle, drawing heat from a source such as the ground or outside air and directing it into the space to be warmed. Such systems can deliver two or three units of heating energy for every unit of electricity purchased.
Electric heating elements are griller elements embedded in metal/non-metal to give uniform heating and are used in oven, toaster, griller, etc. to give larger surface area which helps in faster dissipation of heat which in turn increases the life of the electric heating element.