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A transformer consists off a primary and secondary coil wrapped
round the same iron core.
They only work with a.c.

Transformers are used in the national grid.

Step-up transformers:
Increase voltage.
Have more coils on the secondary than on the primary coil.

Step-down transformers:
Decrease voltage.
Have more coils…




Very useful and straight to the point. Thank you !!

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