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Monday, October 5, 2009

Electric Stove



An electric stove converts electricity into heat to cook and bake.

The first technology used resistive heating coils which heated iron hotplates, on top of which the pots were placed.

In the 1970s, the glass-ceramic cooktops started to appear. Glass-ceramic has verylow thermal conductivity, but allows infrared radiation to pass very well. Electrical heating coils orinfrared halogen lamps are used as heating elements.

Because of its physical characteristics, the cooktop heats more quickly, less afterheat remains, and only the plate heats up while the adjacent surface remains cool. Also, these cooktops have a smooth surface and are thus easier to clean, but they only work with flat-bottomed cookware and are markedly more expensive.

Unlike the gas stove, the electric stove was slow to catch up due to the fact that most cities and towns had to be electrified. But by the early 1940s the technology had matured and the electric stove slowly began to replace the gas stovesm especially in the household kitchens

A third technology—developed first for professional kitchens, but today also entering the domestic market—is induction stoves.These heat the cookware directlythrough electromagnetic induction and thus require pots and pans with ferromagnetic bottoms. Induction stoves also often have a glass-ceramic surface

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