Bac F3 Bénin
Benin Baccalauréat Série F3 (Électrotechnique)
ElectrotechniqueEnglish
Exam overviewPractice session
A single-phase step-down transformer has N1 = 1200 primary turns and N2 = 120 secondary turns. When connected to a U1 = 230 V, 50 Hz primary supply, what is the no-load secondary voltage U20 and transformation ratio m?
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