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  • Created by: Matilda
  • Created on: 19-05-10 09:33

What are they?

A transformer consists of two coils of wire around an iron core. There is a primary core and a secondary core

A step down trnsformer is used in the national grid to make the voltage lower thus safer to use.

How does it work...?

1. A alternating current is passed through the primary coil.

2. The iron core then becomes magnetised. But because the current is alternating, it means that the…


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