I don't understand the topic Transformers. What are they?

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My teacher hasn't done them yet but my mock exam is coming up on tuesday so I really need to undersatnd them.

Posted Thu 12th April, 2012 @ 15:09 by MissEmilieBeth

2 Answers

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Electricity from the generator is fed to a transformer. They change the size of an alternating voltage. They step up the voltage for the national grid to 400000 v . They are stepped down for domestic uses such as in a house, to 230 v .

Basically, they change the voltage for specific uses and efficiency.

Answered Thu 12th April, 2012 @ 15:19 by Meghna
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Basically the function of a Transformer is that it has 2 coils of wire which is insulated by an iron core. So when an A.C is passed through the primary coil the Alternate voltage is induced in the secondary coil. By "induced" i mean that it moves to the secondary coil.

And this is all because the A.C passes through the primary coil & produces a Alternating mangnetic field. And then the magnetic field lines of the A.C current passes the secondary and induces an alternating current.

but the basics of Transformers you should know is that;
the voltage we receive at home is 230V (For homes/offices)
Also a power station generator produces an A.C voltage of around 25000 volts. 

Remember in transformers there are step up and step down transformers.

If you need any help, just reply back to this and i'm willing to help.
Im not sure, but what i just wrote might be a bit to detailed |:  If it is, im so sorry.

Answered Thu 12th April, 2012 @ 15:55 by Nishat Ahmed