Transformer

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Uploaded by on May 6, 2010

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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 mutual induction.
If a load is connected to the secondary, an electric 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 (VS) is in proportion to the primary voltage (VP), and is given by the ratio of the number of turns in the secondary (NS) to the number of turns in the primary (NP) as follows:

By appropriate selection of the ratio of turns, a transformer thus allows an alternating current (AC) voltage to be "stepped up" by making NS greater than NP, or "stepped down" by making NS less than NP.
In the vast majority of transformers, 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 with 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 power transmission, which makes long distance transmission economically practical.

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  • woltage hah ha

  • thats a straight up indian accent

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  • @kyoojona I guess if you used correct term. I have heard from many sources say always unplug power supplies when not in use.Thousand of people around the world have their phone chargers,Xbox360 consoles,Laptop charger etc. plugged in 24/7. How much energy is consumed in 1 year. Does it really save you much money?.By the way I have at least 15 power supplies plugged in 24/7..Thanks for sharing your idea.

  • @4u250ut and also once a device can put out more energy than is put in, that is what is termed as free energy or overunity device, even though the correct term should be "Unity" bcaz it is tapping the one fluid energy why pervades and is everything in different forms

  • @4u250ut What is misleading is the idea that energy is not free, when it is literally everything U can think of, even the thought itself lol

  • @kyoojona I understand transformers can be configured some way so you gain more output.But when you said its FREE ENERGY DEVICE its kind of misleading that's all. :))

  • @4u250ut If U energize "one" coil on a transformer the other coil gets energized... it is like running water through a hose and see water flowing in a completely different hose beside it>>>However, the way transformers are used currently cancels out the gains one would receive, a transformer could also be built a certain way to gain more output than input... If U would like a more in depth and technical explanation, please ask

  • @kyoojona Free energy device? How so? please explain.

  • u forgot the step down :I

  • Rather shitty video.

  • Does anybody else realize that the transformer is a free energy device?

    

  • Thank you ! 

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