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Консультация № 161716
01.03.2009, 17:25
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Колебательный контур содержит конденсатор ёмкостью C = 8 пФ и катушку индуктивностью L = 0,5 мГн. Каково максимальное напряжение Um на обкладках конденсатора, если максимальная сила тока Im = 40 мА
Обсуждение
Неизвестный
02.03.2009, 15:47
общий
это ответ
Здравствуйте, Нечаева Дарья Алексеевна!
Колебательный контур содержит конденсатор ёмкостью
C = 8 пФ= 8e-12 (Ф)
и катушку индуктивностью
L = 0,5 мГн= 0.5e-3 (Гн)
Каково максимальное напряжение
Um=?
на обкладках конденсатора, если максимальная сила тока
Im = 40 мА= 40e-3 (А)
___
Энергия при колебаниях перетекает туды-сюды.
То она вся в катушке
Em(L)= L*Im^2/2
то вся в конденсаторе
Em(C)= C*Um^2/2
Em(L)= Em(C)
C*Um^2/2= L*Im^2/2
Um= sqrt(L*Im^2/C)= sqrt(0.5e-3*40e-3^2/8e-12)
Ответ
Um= 316 (В)
Колебательный контур содержит конденсатор ёмкостью
C = 8 пФ= 8e-12 (Ф)
и катушку индуктивностью
L = 0,5 мГн= 0.5e-3 (Гн)
Каково максимальное напряжение
Um=?
на обкладках конденсатора, если максимальная сила тока
Im = 40 мА= 40e-3 (А)
___
Энергия при колебаниях перетекает туды-сюды.
То она вся в катушке
Em(L)= L*Im^2/2
то вся в конденсаторе
Em(C)= C*Um^2/2
Em(L)= Em(C)
C*Um^2/2= L*Im^2/2
Um= sqrt(L*Im^2/C)= sqrt(0.5e-3*40e-3^2/8e-12)
Ответ
Um= 316 (В)
Форма ответа
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