Transformer basic
Transformers are electrical devices consisting of two or more
coils of wire used to transfer electrical energy by means of a changing
magnetic field One of the
main reasons that we use alternating AC voltages and currents in our homes and the workplace is that AC supplies can be easily generated at a convenient
voltage, transformed (hence the name transformer) into much higher voltages and
then distributed around the country using a national grid of pylons and cables
over very long distances. you can know more from here...
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