in adaptor circuit there is a transformer(it has four input & four output)

in adaptor circuit there is a transformer(it has four input
& four output)which is used after rectifier .for what they
are using this? they connect input between 1&4 and get
output across 1&2 how it is possible?

Question Posted / vignesh

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in adaptor circuit there is a transformer(it has four input & four output)which is used after ..

Answer / jkm

possiblle. this is a tapped transformer. if you changing
pin 1 to 4 means output vltage will reduce. but in output
voltage will increase if you increase the pi configuration.

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