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If it is a voltage step-up there is a corresponding step-down of current so the product is very close to being the same. There will be some loss as a transformer is not 100% efficient. If it is a step-down voltage there will be a step-up with regard to current and remember, it is the product of voltage and current that equals power.
But why is there a corresponding step-down of current?
for the conservation of energy. If it was the other way around, the transformer would become a generator, you could sell the produced power and make a million.
Power in will be equal to or a little less than power out. That is why.
So could you say that the resistance of the secondary coil in/decreases to match the change of voltage/current?
I wouldn't say it that way. You realize of course the actual current will depend on the load connected to the secondary, and the capacity of the source power.
What kind of statement are you required to make?
What you did say might be appropriate if you used the term impedance. A transformer will transform current, voltage, and impedance.
all at the same time! lol.
Thanks, that’s exactly the kind of thing I was looking for.
So it's essentially 'AC resistance' to put it crudely?
1:2 transformer will double the voltage, halve the current and present an impedand of 1:4 (I think it is the square of the turns ratio) (my memory is not the best lol)
I believe you have come to terms with an explanation that suits you and explains it for you. Good luck in your studies.