Unit Three: Transformers Flashcards
(4 cards)
What do transformers do?
Change the potential difference - but only AC (altering current) potential difference
Name the two different types of transformer:
What do they do?
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
How do transformers work?
By electromagnetic induction
What does the primary coil do?
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