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Консультация № 186585
02.09.2012, 22:19
0.00 руб.
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2
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Имеется катушка, индуктивность которой равна 240 мГн, и сопротивление 5,6 Ом, подключенные последовательно к источнику тока. ЭДС источника равна 12 В. При помощи переключателя источник тока отключается, и катушка замыкается накоротко. Во сколько раз уменьшится сила тока в катушке через 0,2 с после выключения источника сила тока? Чему равна постоянная времени?
Имеется катушка, индуктивность которой равна 240 мГн, и сопротивление 5,6 Ом, подключенные последовательно к источнику тока. ЭДС источника равна 12 В. При помощи переключателя источник тока отключается, и катушка замыкается накоротко. Во сколько раз уменьшится сила тока в катушке через 0,2 с после выключения источника сила тока? Чему равна постоянная времени?
Обсуждение
03.09.2012, 11:20
общий
это ответ
Здравствуйте, Massimo!
Находим постоянную времени рассматриваемой цепи:
Обозначим через I0 и I силы тока в цепи соответственно до и через t = 0,2 с после отключения источника. Находим уменьшение силы тока:
Ответ: сила тока уменьшится в 106 раз; постоянная времени равна 0,0429 с.
Как я понимаю, для решения задачи не нужно знать ЭДС источника.
С уважением.
Находим постоянную времени рассматриваемой цепи:
Обозначим через I0 и I силы тока в цепи соответственно до и через t = 0,2 с после отключения источника. Находим уменьшение силы тока:
Ответ: сила тока уменьшится в 106 раз; постоянная времени равна 0,0429 с.
Как я понимаю, для решения задачи не нужно знать ЭДС источника.
С уважением.
5
Большое спасибо!!!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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