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Unit Three: Transformers Flashcards

(4 cards)

1
Q

What do transformers do?

A

Change the potential difference - but only AC (altering current) potential difference

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2
Q

Name the two different types of transformer:

What do they do?

A

Step up and step down transformers

Step up -
•step the voltage up
•they have more turns on the secondary coil than the primary coil

Step down -
•step the voltage down
•they have more turns on the primary coil than the secondary coil

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3
Q

How do transformers work?

A

By electromagnetic induction

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4
Q

What does the primary coil do?

A

Produces a magnetic field which stays within the iron core, meaning that nearly all of it passes through the secondary coil and hardly any is lost

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