napiecie w uzwojeniu pierwotnym transformatora wynosi 100 V a natezenie 20 A. Jakie bedzie napiecie w uzwojeniu wtornym jesli natezenie wynosi 5 A
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U/I = U/I
100 V / 20A = U / 5 A
5 Ohm = U / 5A
U = 25 V