## Ideal Transformer

something i read from the text book and i don't understand.

"in an ideal transformer, no magnetizing current is required to produce the flux"

so, where does the flux come from?
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Recognitions:
Homework Help
If the primary coil is a perfect inductor (in an ideal transformer R = 0) the current lags the voltage by 90 degrees. Since Power is $VIcos\phi = VIcos90 = 0$ the currrent does no work.