Electric Induction Cooktop

electric induction cooktop

    electric induction
  • Electrostatic induction is a redistribution of electrical charge in an object, caused by the influence of nearby charges. Induction was discovered by British scientist John Canton in 1753 and Swedish professor Johan Carl Wilcke in 1762.

  • An assembly of stove burners that fits into countertop.

  • A surface mounted stove usually with four to six burners.

  • A cooking unit, usually with hot plates or burners, built into or fixed on the top of a cabinet or other surface

  • A kitchen stove, cooking stove, cookstove or cooker is a kitchen appliance designed for the purpose of cooking food. Kitchen stoves rely on the application of direct heat for the cooking process and may also contain an oven, used for baking.

Faraday's motor and induction ring*

Faraday's motor and induction ring*

In Oct 1820, the Dane, H C Oersted, had discovered that passing electric current through a wire produced a magnetic field – a compass needle was deflected. Michael Faraday reversed the process and created the first motor. Not a practical device but an experiment to show that that a magnet (left hand flask) would rotate around a wire carrying current and, equally that a wire carrying current would rotate round a magnet (right hand flask). In the picture, the vessels are full of mercury thus allowing the current to flow. All modern motors and generators rely on this discovery. Faraday also discovered that when two coils are wound on an iron ring a change in the flow of current in one produces a change in current in the other, this is the basis of the old-fashioned children's electric-shock coil. When a low voltage fed through a coil of a few turns is interrupted, it produces a very high voltage - but a safe low current - in another coil of many turns. This causes nasty but safe shocks. The same principle makes the plugs of a car spark.
This a photograph of Faraday’s original "Inductor" ring. The actual ring can be seen in the basement exhibition at the Royal Institution building.



Induced currents are produced when a conductor through which a current flows is brought near to or taken away from a second conductor forming a closed circuit. In Fig. 178, p represents the smaller or primary coil of stout wire joined to a battery cell E, s the secondary coil of finer wire joined up to a sensitive galvanometer G. Whenever p is lowered or taken away from s, the needle of the galvanometer indicates a current. The directions of the induced currents produced by the different motions of the inducing coil P will be opposite to each other. The induced current produced by approaching s to P flows in the opposite direction to the inducing current of the battery. The induced current produced by removing p from s flows concurrently with the inducing current of the battery.

electric induction cooktop

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