What is a Transformer?

It probably is just a misspelled transformer.

It is amazing what one little vowel can do.

Here's one I made earlier

The good ones are Autobots, but the bad ones are Deceptocons.

A transformer is an electrical device for reducing or increasing voltage generally speaking, where line voltage is is run through a coil in close proximity to another coil, the secondary coil then picks up part of the voltage according to the number of coils contained in each coil...more specifically...

"A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors-the transformer's coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer's core and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF), or "voltage", in the secondary winding. This effect is called inductive coupling.

If a load is connected to the secondary, current will flow in the secondary winding, and electrical energy will be transferred from the primary circuit through the transformer to the load. In an ideal transformer, the induced voltage in the secondary winding (V_s) is in proportion to the primary voltage (V_p) and is given by the ratio of the number of turns in the secondary (N_s) to the number of turns in the primary (N_p) as follows:

By appropriate selection of the ratio of turns, a transformer thus enables an alternating current (AC) voltage to be "stepped up" by making N_s greater than N_p, or "stepped down" by making N_s less than N_p. The windings are coils wound around a ferromagnetic core, air-core transformers being a notable exception.

Transformers range in size from a thumbnail-sized coupling transformer hidden inside a stage microphone to huge units weighing hundreds of tons used to interconnect portions of power grids. All operate on the same basic principles, although the range of designs is wide. While new technologies have eliminated the need for transformers in some electronic circuits, transformers are still found in nearly all electronic devices designed for household ("mains") voltage. Transformers are essential for high-voltage electric power transmission, which makes long-distance transmission economically practical."

http://en.wikipedia.org/wiki/Transformer

Great!!!

I wonder nobody replied as "Dont ask homework questions", "This is not homework section", "google is there"!!!!

Because this is a long week end and every one is in good mood.

Your information about tranformer is very nice. But I want to ask you one question! In tranformer's, the primary voltage is high but current is less whereas the secondary voltage is less but the current value is much higher! I want to know the reason. Please explain me.

The conservation of energy is the root of your answer. Now how this universal law gets applied in a transformer takes a lot of schooling. Electromagnetism is a sophomore or junior level class in college.

More than meets the eyes!!

"A transformer is a little bird tweeting in meadow; a transformer is a wreath of pretty flowers which ... smell bad..."