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Hi, Just made a small thought experiment on the train, haven't really thought about it in depth. I was just wondering, if I created the above scenario (open circuit secondary and a voltmeter), would I get a voltage (assuming there is a difference in turns for primary and secondary)? Neglecting like capacitive or inductive coupling.

I have a feeling not, because both sides are isolated. (?)

And if so, could this be used to tell me something about the turns ratio or it's error?

Presumably if there was a voltage, both sides of the TX would be in-phase. But, please remind me, if the sides were slightly out of phase, that would be from the

*resistance*in the primary and secondary coils?

So say the phase of the secondary was a bit out from that of the input, what would that mean to the 'class' of the transformer?

Also, would you then need like a bridge to feed in the primary and secondary to see the phase error of the TX?

Or what if the turns ratio is like N decimal point something? (not exactly just N) what does that mean for the TX 'class'?

Thanks