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Transformers are used to _____ __ or step down
_______. They only work on AC because an ________
current in the primary coil causes a constantly alternating
_______ ______. This will "_____" an alternating
current in the secondary coil.
Words ­ alternating, magnetic field, induce, step up, voltage
We can work out how much a transformer will step up or
step down a voltage:
Voltage across primary (Vp) No. of turns on primary (Np)
Voltage across secondary (Vs) No. of turns on secondary (Ns)…read more


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