Transformers

Question 1

Step- up transformers

Answer 1

Step the voltage up. They have more turns on the secondary coil.

Question 2

Step- down transformers

Answer 2

Step the voltage down. They have more turns on the primary coil.

Question 3

What do transformers work by?

Answer 3

Electromagnetic induction

Question 4

How do transformers work?

Answer 4

The primary coil produces a magnetic field which stays in the iron core, meaning nearly all of it is passed on, hardly anys lost.

Question 5

Because of the AC in the primary coil…

Answer 5

the iron core is constantly changing direction

Question 6

What flows in the iron core?

Answer 6

Magnetic field…NOT current

Question 7

Transformer equation

Answer 7

primary voltage = no. of turns on primary
——————– ——————————
secondar voltage no. of turns on secondary

Question 8

Why do we need step up/down transformers?

Answer 8

You need a high voltage or current to transmit a lot of power but current is easily lost o high voltage is better.