Предмет: Физика, автор: FreshMin7

через участок цепи на рисунке течёт постоянный ток I=4 A. Какую силу тока показывает амперметр? Сопротивление амперметр пренебречь​

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Ответы

Автор ответа: ahmedivadilnaz16
2

Ответ:

І1-неизвестный ток через амперметр=ток на верхнем участке цепи.

U1=r*I1-напряжение на верхнем участке цепи.

U2=U1=r*I1-наряжение на нижнем участке цепи.

I2=U2/3r=I1/3-ток на нижнем участке цепи.

I=I1+I2=I1+I1/I3=4* I1/3=I1=3*I/4=3*4/4=ЗА

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