Transformers

Question 1

What is the name of a transformer used in a phone charger?

Answer 1

Switch mode transformer

Question 2

How is a transformer structured?

Answer 2

An iron core, with a primary and secondary coil wrapped around it

Question 3

Transformers only work with _______ current

Answer 3

Alternate

Question 4

How do a step down transformer and step up transformer affect potential difference

Answer 4

Decreases potential difference and Increases potential difference

Question 5

Why are switch mode transformers more useful than traditional transformers

Answer 5

Work at higher frequencies so they can be made much lighter

Much more efficient

Question 6

A transformer has 40 turns on the primary coil, and 800 on the secondary coil. If the input potential difference is 1000V, work out the output potential difference.

Vp/Vs=Np/Ns

Answer 6

Flip equation so that:
x/1000 = 800/40
800/40=20
1000*20=20,000
Vs=20,000