Предмет: Физика, автор: незнайка1981

КПД трансформатора 90 %. Напряжение на концах первичной обмотки U1 = 220 В, на концах вторичной U2 = 22 В. Сила тока во вторичной обмотке I2 = 9 А. Какова сила тока I1, в первичной обмотке трансформатора?

Ответы

Автор ответа: lenalviv
25
P2=U2*I2
P1=P2/η=22*9/0.9=220 ΅Βτ
Ι1=P1/U1=220/220=1 A

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