Talk:Fundamental Physics/Electricity/Transformer

i have a doubt.. in a step up transformer ,, does voltage or current or both increase or neither of them,,,,, really so much confused... please help...!!! (10:27, 28 December 2013‎ by User:KeshavRGende)

Electricity isn't my field, but see Wikipedia:Transformer#Notes for an explanation of step-up and step-down transformers. -- Dave Braunschweig (discuss • contribs) 17:25, 28 December 2013 (UTC)

Well, it is my field... or was.... The Wikipedia article has the correct information. In a step up transformer, the voltage is "stepped up" from the input to the output. However, transformers will work in both directions. That is, reverse the wiring for a step up transformer, it becomes a step down transformer. It's the same transformer. Because transformers are not power sources, the output power is always less than the input power, due to losses. Roughly, however, neglecting losses the power in both sides is the same. The power is the product of the voltage and current. "Step up" refers to the voltage. The current, then, goes down, to keep the power the same. —Abd (discuss • contribs) 19:39, 28 December 2013 (UTC)