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Up=220V
Iw=0.4A
Uw=?
Ip*Up=Iw*Uw
Uw=Ip*Up/Iw
Uw=0.2A*220V/0.4A
Uw=44V/0.4=110v
Up = 220V
Iw = 0,4A
Uw : Up = Ip : Iw
Uw = Up*Ip : Iw
Uw = 220V * 0.2A : 0,4A=110V
Odp W uzwojeniu wtórnym panuje napięcie 110V.