transformer ratio?

[The Roc]

I was wondering if anyone can help me ,does anyone know what the ratio in a transformer from primary to secondary , 1 : 4 ? thanks

 

[zog]

Um, 1 to 4.

 

[Besoeker]

I was wondering if anyone can help me ,does anyone know what the ratio in a transformer from primary to secondary , 1 : 4 ? thanks

It can be almost anything.
Care to be more specific about the transformer you have in mind?

 

[The Roc]

it was a question on my exam ..

it was a question on my exam ..

if the the primary on a transformer turns 40 times , how many times does it turn on the secondary, that all i remember... thanks..

 

[Smart $]

if the the primary on a transformer turns 40 times , how many times does it turn on the secondary, that all i remember... thanks..

http://en.wikipedia.org/wiki/Transformer

 

[The Roc]

thanks smart $ and co.

thanks smart $ and co.

you guys are very helpful .

 

[Besoeker]

if the the primary on a transformer turns 40 times , how many times does it turn on the secondary, that all i remember... thanks..

Maybe you could give the whole question?

 

[LarryFine]

Roc, welcome to the forum!

I was wondering if anyone can help me ,does anyone know what the ratio in a transformer from primary to secondary , 1 : 4 ? thanks

The turns ratio determines the voltage ratio. With a 1:4 turns ratio, the secondary voltage is 4 times that of the primary. The voltage varies proportionately with the turns ratio, and the current varies inversely with the turns ratio.

A 1:4 transformer with a 120v primary (when actually fed with 120v) would have a 480v secondary voltage. However, for each amp the secondary supplies to the load, the primary current requires four amps from its supply.