Предмет: Физика, автор: FDGOD321

При включении катушки в цепь постоянного тока с напряжением 12 В амперметр показал силу тока 4 А. При включении той же катушки в цепь переменного тока с частотой 50 Гц и напряжением 12 В амперметр показал ток 2,4 А.Найти индуктивность катушки.Что покажет амперметр, если последовательно с этой катушкой включить конденсатор емкость 394 Мкф

Ответы

Автор ответа: sokolovvovikn

10

Ra=U/I1=12/4=3 Ом
Полное сопротивление R=U/I2=12/2,4=5 Ом
R^2=Ra^2+RL^2
RL=sqrt(R^2-Ra^2)=sqrt(25-9)=4 Ом
2*pi*v*L=RL
L=RL/2*pi*v=4/6,28*50=0,012 Гн

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