Предмет: Физика, автор: danpersov

. Записать выражение для мгновенного значения тока в цепи с резистором R=100 Ом, подключенного к источнику питания переменного напряжения 42B с частотой 50 Гц, если начальная фаза Фи = 45

Ответы

Автор ответа: Vamdemon

закон изменения напряжения:
u=Ucos(wt+fo)=42cos(100Пt+п/4)
Разделим правую и левую часть на R, чтобы получить закон изменения силы тока:
i=0.42cos(100Пt+П/4)

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