Unit 3 - Transformers

Question 1

What are transformers (both) made up from?

Answer 1

Two coils (the primary and secondary) joined with an iron core

Question 2

What do step-up transformers do? What are their turns like on the coils?

Answer 2

Step the voltage up.

They have more turns on the secondary coil than the primary coil

Question 3

What do step-down transformers do? What are their turns like on the coils?

Answer 3

Step the voltage down.

They have more turns on the primary coil than the secondary coil

Question 4

What do transformers do? what does this mean?

Answer 4

They use electromagnetic induction to change the pd, so they ONLY WORK ON AC

Question 5

What does the primary coil produce?

Answer 5

A magnetic field which stays within the iron core