How does the principle of induction apply to cooktops in electric ranges?
Some electric ranges have a twist of wire instead of a hot plate. This carries AC and produces a strongly varying bewitching field. When a conducting saucepan is placed upon it, eddy currents are induced in the metal in the root of the saucepan. These produce heat via ohmic losses (and hysteresis in magnetisation). One could ruminate on the coil in the cooktop as a primary and the metal in the saucepan as the copied of a transformer. As the heat is produced directly in the saucepan itself, less warmth is wasted in the cooktop or the air.










