Transformer

Ideal transformer and induction law[lower-alpha 5]

Instrument transformer, with polarity dot and X1 markings on LV side terminal

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromagnetic induction produces an electromotive force within a conductor which is exposed to time varying magnetic fields. Transformers are used to increase or decrease the alternating voltages in electric power applications.

单词	Audio transformer
释义	Audio transformer 英语百科 Transformer A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromagnetic induction produces an electromotive force within a conductor which is exposed to time varying magnetic fields. Transformers are used to increase or decrease the alternating voltages in electric power applications.
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Audio transformer

Transformer