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Mar11-12, 06:15 PM
P: 18
I mean,

If an ideal step up transformer increases the voltage from 10V to 20V say, why does the current halve?

I know it happens and I know the equations for it, I know to say otherwise would contradict the law that energy cannot be created.

But putting the equations aside, why exactly does it happen?

EDIT: The part I don't understand is that when the potential difference increases, and the resistance (in the secondary) remains constant (I think?), why does current decrease?
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