Transformer|| transformer use||electrical device laminated What is a transformer? A electrical device may be a device that transfers electrical energy from one alternating-current circuit to at least one or additional different circuits, either increasing (stepping up) or reducing (stepping down) the voltage. Where square measure transformers used? Transformers square measure used for wide variable functions. for instance, a electrical device is usually wont to cut back the voltage of standard power circuits to control low-tension devices and to lift the voltage from electrical generators so power is transmitted over long distances. Why is that the iron core of a electrical device laminated? The iron core of a electrical device is laminated to scale back eddy currents. Eddy currents square measure the tiny currents that result from the ever-changing force field created by the electrical energy within the initial coil. they have to be decreased in order that they won’t disturb the flow of electricity from the first coil to the secondary winding transformer, device that transfers electrical energy from one alternating-current circuit to at least one or a lot of different circuits, either increasing (stepping up) or reducing (stepping down) the voltage. Transformers area unit used for wide variable purposes; e.g., to cut back the voltage of typical power circuits to work low-tension devices, like doorbells and toy electrical trains, and to lift the voltage from electrical generators in order that power are often transmitted over long distances Transformers modification voltage through magnetic force induction; i.e., because the magnetic lines of force (flux lines) build up and collapse with the changes in current passing through the first coil, current is iatrogenic in another coil, known as the secondary. The secondary voltage is calculated by multiplying the first voltage by the quantitative relation of the quantity of turns within the secondary to the quantity of turns within the coil, a amount known as the turns quantitative relation. Air-core transformers area unit designed to transfer radio-frequency currents—i.e., the currents used for radio transmission; they include 2 or a lot of coils wound around a solid insulating substance or on Associate in Nursing insulating coil kind. Iron-core transformers serve analogous functions within the audio-frequency vary. Impedance-matching transformers area unit accustomed match the electric resistance of a supply which of its load, for many economical transfer of energy. Isolation transformers area unit sometimes used for reasons of safety to isolate a bit of kit from the supply of power.