It was mentioned previously that electricity is not a fuel. Hence electric stoves are not provided with burners. They have heaters which contain coils of wires through which an electric current passes. Electricity is the cleanest source of heat for cooking. But in order to operate an electric stove economically, it is necessary to utilize the current required for a heating element to its greatest extent. For example, if the current is turned on to heat the oven as many foods as possible should be cooked in the oven.